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(Click for frequent words.) 72 resistant tiles 68 heat shield 65 thermal tile 62 shielding tiles 62 insulating tiles 61 orbiter 59 bipod ramp 58 insulating foam 57 flyaway foam 57 shuttle thermal tiles 57 foam insulation 56 thermal blanket 56 Endeavour belly 56 tank foam insulation 55 fragile thermal tiles 54 gap fillers 54 insulation foam 54 tile fillers 53 tile filler 53 heatshield 53 intertank 53 foam 52 superhot gases 52 tank insulating foam 52 silica tiles 52 shuttle thermal shielding 52 protruding strips 52 protruding thermal 52 thermal shielding 52 shuttle underside 52 flame trench 52 shuttle underbelly 51 protective thermal tiles 51 damaged thermal tiles 51 orbital debris 51 Discovery thermal tiles 51 Discovery liftoff 51 micrometeoroid 51 orbital maneuvering system 50 micrometeoroids 50 space shuttle 50 gap filler 50 Columbia insulating tiles 50 foam shedding 50 ice frost ramps 50 liftoff 49 Reinforced Carbon Carbon 49 shuttle disintegrated 49 loosened blanket 49 allowing superheated gases 49 foam insulation peeled 49 Insulating foam 49 Gerstenmaier 49 spacecraft 48 shuttle Challenger 48 atmospheric reentry 48 micrometeorites 48 nose cone 48 subsurface cracks 48 OMS pod 48 vulnerable thermal shielding 48 starboard wing 47 rivet holes 47 superheated gases penetrated 47 Thermal Protection 47 Soyuz Fregat rocket 47 manager Ron Dittemore 47 shuttle 47 insulating foam broke 47 flyaway chunk 47 flyaway fuel 47 Columbia disintegrated 47 Solid Rocket Boosters 47 External Tank 47 nosecap 47 makeshift hacksaw 46 Discovery astronauts 46 fuselage 46 Dittemore 46 booster rockets 46 Ares IX rocket 46 protruding filler 46 foam fragment 46 Foam insulation 46 shuttle Discovery 46 spacewalking astronaut 46 space shuttle Discovery 46 Astronauts inspect 46 gashed wing 46 Readdy 46 Columbia Accident Investigation 45 foam wedges 45 Space Shuttle Program 45 Taurus XL 45 Discovery STS 45 ablator 45 delamination 45 unscheduled spacewalk 45 spacewalking repairs 45 spacecraft disintegrated 45 director Tony Ceccacci 45 spacewalk 45 delaminating 45 lengthy postflight repairs 45 aft skirt 45 superheated atmospheric gases 45 spacesuits 45 gumdrop shaped capsule 44 orbiters 44 ship thermal shielding 44 starboard SARJ 44 gaseous hydrogen leak 44 Endeavour thermal shielding 44 rim joist 44 1 #/#-pound chunk 44 micrometeorite 44 graphite epoxy 44 superheated gases 44 TPS Thermal 44 Ares IX 44 orbiter underside 44 spokesman Allard Beutel 44 paint flaking 44 rigid foam insulation 44 meteoroid 44 shuttle Atlantis 43 fiery gases 43 aeroshell 43 orbiter robotic arm 43 Gusev crater 43 atmospheric gases 43 tiles 43 LeRoy Cain chairman 43 shuttle missions 43 astronauts 43 spokesman Michael Braukus 43 Space Shuttle Discovery 43 space shuttle Atlantis 43 intertank region 43 backshell 43 Ceccacci 43 Martian orbit 43 Aloha Airlines #-# 43 ECO sensors 43 spalling 43 countdown dress rehearsal 43 fiery reentry 43 hull plating 43 Martian atmosphere 43 tiny meteoroids 43 RQ# 42 ECO sensor 42 solid rocket boosters 42 longeron 42 flyaway foam insulation 42 liftoff dooming 42 Space Shuttle Columbia 42 orbiting shuttle 42 foam gouged 42 Taurus XL rocket 42 commander Pam Melroy 42 horizontal stabilizers 42 delaminated 42 cowling 42 Soyuz capsule 42 pitot probe 42 Thermal tile 42 Space Shuttle Atlantis 42 Scolese 42 Endeavour docked 42 faceshields 42 space shuttles 42 payload bay 42 shuttle orbiter 42 Mars rover Opportunity 42 shuttle nose cone 42 astronaut Charles Camarda 42 Space Shuttle Endeavour 42 spacesuit gloves 42 Flyaway foam remained 42 GSLV D3 rocket 42 shuttle Atlantis STS 42 Opportunity rovers 42 untested goo 42 martian surface 42 hydrazine tank 42 SSMEs 42 Discovery thermal shielding 41 spraying brine 41 undocking 41 Curiosity rover 41 Engelauf 41 wing slat 41 coastal Naro 41 laser altimeter 41 lunar dust 41 shuttle Endeavour belly 41 payload fairing 41 GUCP 41 spacewalkers 41 nosewheel 41 Imaging Spectroradiometer MODIS instrument 41 spacewalking astronaut gently 41 OMS pods 41 shuttle astronauts 41 #/#-minute climb 41 fabric filler protruding 41 Rosetta spacecraft 41 Atlantis robotic arm 41 Rick Husband 41 flyby spacecraft 41 mothership WhiteKnightTwo 41 IBEX spacecraft 41 cement slurry 41 3 #/#-inch-long gouge 41 martian atmosphere 41 Flight Readiness 41 Atlantis STS 41 NASA Lunar Crater 41 Ron Dittemore 41 brake rotor 41 lunar surface 41 spacewalking astronauts 41 lunar orbits 41 cosmonaut Alexander Kaleri 41 elastomeric coating 41 steel shavings 41 Hubble servicing 41 exterior siding 41 highly flammable soundproofing 41 hypergolic 41 shuttle robotic arm 41 NASA Voyager spacecraft 41 bipod fitting 41 hairline cracks 41 robotic Canadarm 41 Cape Canaveral Fla. 40 APXS 40 Mastracchio 40 pressurization lines 40 Endeavour STS 40 pinholes 40 cork insulation 40 orbital module 40 Spacewalk instructor 40 shuttle fleet 40 spacewalker Scott Parazynski 40 Earth magnetosphere 40 Galileo spacecraft 40 Atlantis thermal shielding 40 delaminate 40 shuttle payload bay 40 ship hull 40 Oleg Skripochka 40 orbital maneuvering engine 40 shuttle Endeavour STS 40 Stefanyshyn Piper 40 deorbiting 40 NASA 40 toxic hydrazine 40 wire cutters pliers 40 jackscrew 40 weather satellite TIROS 40 searing gases 40 spacecraft thrusters 40 nighttime illumination flares 40 Orbiting Carbon Observatory 40 unmanned probes 40 Harmony compartment 40 spokesperson Allard Beutel 40 NIRSpec 40 rubber gasket 40 landing gear 40 Messenger spacecraft 40 nosecone 40 Itokawa 40 delaminations 40 lengthy postflight shuttle 40 NASA Lunar Reconnaissance 40 filler poking 40 Space Shuttle STS 40 cryogenic engine 40 Kostelnik 40 polar craters 40 Nasa spacecraft 40 refasten 40 Nasa Mars Reconnaissance 40 Parazynski floated 40 elevons 40 orbital maneuvering 40 laboratory Skylab 40 shuttle Endeavor 40 rover Spirit 40 martian soil 40 Mars CRISM 40 LCROSS spacecraft 40 yellow halter bikini 40 spy satellites malfunctioned 40 NASA Kepler telescope 40 shuttle Endeavour 40 MESSENGER spacecraft 40 rapid depressurization 40 micrometeorite impacts 40 Spacewalking astronauts 40 director Heather Rarick 40 Saturn moon Mimas 40 Atlantis astronauts 40 Orion spacecraft 40 LCROSS 40 Russians Alexander Kaleri 40 linkup uncovered 40 Atlantis undocks 40 Mars Opportunity rover 40 Martian arctic 40 Fiberglass insulation 40 resistant ceramic tiles 40 Sojourner rover 40 Pilot Terry Virts 40 tiny pinholes 40 orbiting Mars 40 emery cloth 39 Cape Canaveral FL AHN 39 insecticide fogger 39 Voyager spacecraft 39 booster rocket 39 ceiling joists 39 OMS Pod 39 JWST 39 tiny meteoroid 39 cryogenic propellants 39 hull 39 putty knives 39 Orbital Maneuvering System 39 scratches dents 39 Martian rover 39 engine compartment 39 PRCB 39 Discovery thrusters 39 DART spacecraft 39 Mini TES 39 starboard truss 39 twin fuselages 39 propeller blade 39 vinyl siding 39 pad #A 39 waxy liner 39 flap actuators 39 aboard Atlantis 39 brushes putty knives 39 sanded smooth 39 Atlantis thermal tiles 39 superheated gases surrounding 39 supercold fuel 39 tinder dry Pinelands 39 vertical stabilizer 39 pinpoints Lopez Alegria 39 space shuttle Endeavour 39 lander 39 Cosmic Origins Spectrograph COS 39 bedrock outcropping 39 NASA Opportunity rover 39 Context Camera 39 unmanned spacecraft 39 Harold Gehman Jr. 39 thrust oscillation 39 vertical stabilizers 39 Bill Gerstenmaier NASA 39 GSLV D3 39 LeRoy Cain 39 3 #/#-inch-long 39 Russian cosmonaut Alexander Kaleri 39 Endeavour astronauts 39 fabric sunshade 39 jagged ridge 39 undocks 39 feedline 39 comet Shoemaker Levy 39 WISE spacecraft 39 director Chuck Dovale 39 Opportunity rover 39 clogged rotary 39 Pad #A 39 orbit 39 silcrete 39 Zvezda Service 39 Infrared Pathfinder Satellite 39 dye penetrant 39 Cabeus crater 39 sidewall 39 required daylight liftoffs 39 thermal tiles exposing 39 Endeavour liftoff 39 Ranging spacecraft 39 Kibo JPM JEM Pressurized 39 Orbiter LRO 39 insulating blanket 39 THEMIS satellites 39 required spacewalking repairs 39 gouged belly 39 Parazynski 39 unmended 39 Geeky tweeters 39 rover Opportunity 39 crib slats 39 NROL 39 ESA ASI 39 Lori Gunter 39 gusset plate 39 orbiting Hubble telescope 39 tail cone 39 masonry chimney 39 Mission Specialists 39 sealant 39 Apollo missions 39 MARSIS radar 39 Baikonur Cosmodrome Kazakhstan 39 NASA rovers 39 Orbiter 39 LO2 39 Kepler spacecraft 39 Searing gases 39 Cassini Huygens spacecraft 38 Space Shuttle 38 Michoud Assembly Facility 38 Launch Pad #B 38 insulating foam peeled 38 sonar dome 38 shuttle aft compartment 38 unsightly blotches 38 NOAX 38 Astronaut Tim Kopra 38 Cosmic Origins Spectrograph 38 Shuttle Atlantis 38 polyurethane coating 38 Pirs docking compartment 38 vapor barrier 38 payload fairing clamshell 38 rear taillight 38 pre docking backflip 38 astronaut Heidemarie Stefanyshyn Piper 38 engine nacelle 38 stains discoloration 38 blowdown stack 38 underbody 38 Stardust spacecraft 38 nosegear 38 sagging ceilings 38 Japanese Kibo module 38 shuttle airlock 38 Mars Orbiter 38 abrasive ash particles 38 Discovery payload bay 38 wavy edges 38 Millimeter sized 38 liquid oxygen feedline 38 STS 38 twin rover Opportunity 38 foam pierced 38 astronaut Rick Mastracchio 38 meteoroids 38 astronaut Robert Curbeam 38 micrometeorite damage 38 Venusian surface 38 HiRISE image 38 lunar module 38 powdery residue 38 Lunar Excursion Module 38 reentries 38 Sensing Satellite LCROSS 38 tile 38 duct tape alleviates 38 possible micrometeorite damage 38 Discovery undocks 38 Diviner instrument 38 rocket nose cone 38 Canadian Julie Payette 38 waterproof coating 38 polar orbit 38 horizontal stabilizer 38 icy moons 38 STSS Demo 38 unplanned spacewalk 38 Herschel telescope 38 longerons 38 Japan Kibo laboratory 38 tire sidewalls 38 spacewalks 38 WISE telescope 38 front fender 38 Pirs airlock 38 Meridiani Planum 38 Cuzzupoli 38 Roger Tetrault 38 HiRISE camera 38 Comet Tempel 1 38 System OBSS 38 small subsurface cracks 38 Cassini 38 probe Huygens 38 spacewalkers Scott Parazynski 38 Hiller outstretched 38 planetary Transits 38 shuttle gashing 38 rotary joint 38 Ariane launcher 38 Curbeam 38 Minotaur IV rocket 38 faulty electronic throttles 38 Meridiani plains 38 polygon shaped 38 Deep Impact comet 38 SARJ 38 stub sill 38 Rick Mastracchio 38 Pirs Docking Compartment 38 Orion CEV 38 payload canister 38 Test TCDT 38 SOHO spacecraft 38 adhesive residue 38 welds 38 Zenit 3SL rocket 38 Mars Pathfinder lander 38 gussets 38 vertical fin 38 fireproofing material 38 Mike Suffredini 38 orbiting observatory 38 whale dorsal fin 38 bargeboards 38 masonry sealer 38 aluminum casing 38 postflight 38 Oefelein piloted 38 PSLV rocket 38 asteroid Eros 38 www.discoverycenteronline.org 38 insulation 38 Wooden pallets 38 Admiral Gehman 38 uncontained failure 38 RSRMs 38 retroreflector 38 fireplace flue 38 spokesman Barron Beneski 38 disassemble Dextre 38 nonstick pans 38 Deep Impact mission 38 comet flyby 37 Cosmodrome 37 static airframe 37 overbrowning 37 Michael Kostelnik 37 docking compartment 37 thruster contamination 37 ceramic tiles 37 spacewalking 37 Smithsonian Institution hangar 37 frayed wires 37 floor joists 37 Tranquility docking mechanisms 37 Martian dust 37 CryoSat satellite 37 #/#-foot rip 37 adventure Zamka 37 Phobos Explorer 37 GEochemistry 37 scuff marks 37 Stardust mothership 37 deorbit 37 Cloud Aerosol Lidar 37 shuttle Discovery STS 37 orbiting complex 37 Foton M3 spacecraft 37 Martian soil 37 OBSS 37 pilot Charles Hobaugh 37 visit http:/www.nasa.gov/shuttle 37 fairing separation 37 Bill Readdy NASA 37 liftoffs 37 LRO spacecraft 37 orbiting spacecraft 37 nutplates 37 spokesman Marc Birtel 37 scratches dings 37 Japanese Kibo lab 37 welded joints 37 Fregat upper stage 37 waterproof nylon 37 Divine Vessel capsule 37 6 #/#-hour spacewalk 37 Frederica Del. 37 budging Wheelock told 37 ZA# 37 Russian cosmonauts Alexander Skvortsov 37 Spacehab module 37 commander George Zamka 37 Kennedy Space 37 indigenous cryogenic engine 37 Mars Reconnaissance Orbiter 37 Rick Linnehan 37 unexplained anomaly 37 fairings 37 lunar orbiter 37 Soyuz rocket 37 lubricate jammed solar 37 spokesman Jeremie Teahan 37 tailcone 37 comet particles 37 Gus Grissom Edward 37 impactor spacecraft 37 Foton spacecraft 37 orbiting telescope 37 dents scratches 37 decoupage glue 37 Orbiter Processing Facility 37 parachutes malfunctioned 37 bulkhead 37 Lunar Prospector 37 brake hose 37 fused silica glass 37 abrasive particles 37 fatigue cracks 37 Spacewalking 37 windshield wiper maneuver 37 Mars Reconnaissance Orbiter MRO 37 Jules Verne ATV 37 adhesive caulk 37 scramjet engines 37 Andrew Feustel 37 Soyuz landings 37 By Jennifer Viegas 37 faulty gyroscope 37 Gehman 37 coolant pump 37 epoxy paint 37 discovered worrisome gouge 37 Lunar Reconnaissance Orbiter LRO 37 Soyuz 37 Cassini orbiter 37 CloudSat 37 rock abrasion 37 ultrasonically welded 37 Titan flyby 37 Saturn outermost moon 37 Endeavour 37 Cavity wall 37 awarded manned spaceship 37 Viking orbiters 37 swinging incense burner 37 twin rovers 37 specialists Scott Parazynski 37 Commander Dmitry Kondratyev 37 Resourcesat 2 37 hypersonic jet 37 flue pipe 37 fried circuit breaker 37 Divine Vessel 37 Commander Eileen 37 Meridiani 37 soffits 37 aluminum honeycomb 37 Mars Polar Lander 37 Mössbauer spectrometer 37 Saturn rings 37 continental flyovers 37 Zvezda module 37 Stardust capsule 37 asteroid Itokawa 37 pebble sized 37 Foton M3 37 metal shavings 37 Chris Lounderman 37 indigenous cryogenic stage 37 astronauts aboard 37 ISS crewmembers 37 Rain overcast sky 37 #/#-hour descent 37 heatproof 37 Cryosat 37 director Mike Leinbach 37 visco elastic memory 37 silicone adhesive 37 cracked eyebar 37 specialist Drew Feustel 37 silicone gel 37 Bill Waldock 37 Deep Impact probe 37 STS #L 37 gloved fingers 37 Omar Baez 37 hydrazine fuel 37 aluminum alloy brackets 37 Phoenix Mars lander 37 helicopter tail rotor 37 silicone caulk 37 lander rover 37 CAPE CANAVERAL Shuttle Discovery 37 astronauts Gus Grissom 37 Virgil I. 37 Ariane rocket 37 NASA Space Shuttle 37 ARRL AMSAT 37 Analyzer TEGA 37 Launch Pad #A 37 Mars Climate Orbiter 37 Soviet cosmonaut Aleksei Leonov 37 enamel coating 37 Discovery undocking 37 Polyurethane polyols 37 exterior stucco 37 gouged Endeavour 37 lunar spacecraft 37 sealing ducts 37 Mirelson 37 microscopic imager 37 Squyres Cornell 37 lint buildup 37 Taepondong 2 37 Discovery 37 shuttle liftoffs 37 #T Turbine Mallards 37 Aloha Airlines Boeing 37 Helios Prototype 37 spacesuit malfunction forced 37 Huygens 37 cedar clapboards 37 bent radiator hose 37 Martian surface 37 sticking accelerator 37 Shuttle astronauts 37 Ulysses spacecraft 37 extravehicular mobility units 37 NASA Stardust spacecraft 37 abraded 37 By Rossella Lorenzi 37 Mike Sarafin 37 corrosion 37 Sturckow maneuvered 37 rear bulkhead 36 NanoSail D 36 containment vessel 36 Yemenia A# 36 Orbiter MRO 36 GSLV F# 36 Noguchi greeting 36 floated harmlessly 36 fiberglass hull 36 aboard Endeavour 36 landing superheated gases 36 deck truss 36 moldy ceiling tiles 36 Harmony Node 36 rocket booster 36 Orbital Debris 36 Atlas 2AS 36 Jupiter Ganymede 36 Hubble Space Telescope 36 EPOXI mission 36 Global Surveyor 36 Soyuz spacecraft 36 Kibo module 36 Antimatter detector 36 spackling compound 36 NASA Orbiting Carbon 36 microgravity environment 36 Masking tape 36 deicing boots 36 Hubble gyroscopes 36 station Quest airlock 36 specially formulated adhesive 36 Shuttle Atlantis blasts 36 geotextile fabric 36 Tim Kopra 36 MARSIS 36 ADIRUs 36 resists abrasion 36 Steel shavings 36 fairing atop 36 field Infrared Survey 36 NASA Spirit rover 36 SN #C 36 Fincke radioed 36 plaster molding 36 engine cowling 36 Col. Pamela Melroy 36 airfoils 36 caulk 36 supercold propellants 36 Quest airlock 36 lunar orbit 36 synthetic stucco 36 pitot 36 exhaust plume 36 radar altimeter 36 ammonia coolant tank 36 Earth orbit 36 astronaut Leroy Chiao 36 Musudan ri 36 called blowdown drum 36 Titanic hull 36 GSLV rocket 36 aluminum alloy struts 36 astronauts Douglas Wheelock 36 Sacred Vessel 36 drogue parachute 36 Russian cosmonaut Nikolai Budarin 36 CAIB recommendations 36 Shuttle Endeavour 36 microgravity experiments 36 Jadriyah bridge sustained 36 Heidemarie M. 36 fuselages 36 Shenzhou VI craft 36 steel shavings clogging 36 Infrared Astronomy 36 Dmitry Kondratyev 36 ammonia tank 36 microscopic cracks 36 #/#-pound chunk 36 Endeavour astronauts inspected 36 manager Mike Suffredini 36 airspeed indicators 36 Pilot George Zamka 36 slats 36 Commander Sergei Volkov 36 soffit 36 frustum 36 sharp paring knife 36 daylight liftoff 36 NFIRE 36 Colloidal Emulsions 36 paw pads 36 flaking 36 obsolete radiator 36 rear bodywork 36 orbital rendezvous 36 thruster firings 36 payload bay doors 36 Planck spacecraft 36 Neopor 36 bent inwards 36 O OREOS 36 Spacewalking astronaut 36 Jadriyah bridge suffered 36 lunar missions 36 Shuttle Discovery 36 rear tire 36 cushioning Jiffy ® 36 #/#-ton truss 36 urethane coating 36 SRBs 36 thermal insulation 36 Oleg Ivanovsky 36 ammonia crystals 36 Lyndin 36 Nasa 36 spokesman Paul Foerman 36 flyscreen 36 Metal shavings 36 Polar Lander 36 windshield 36 supercold liquid hydrogen 36 pyrotechnic bolt 36 spacesuit 36 bowsprit 36 unrepaired gouge 36 waterproof membrane 36 Shuttle Derived 36 Bowersox Pettit 36 spherules 36 Ayles Ice Shelf 36 ejecta blanket 36 Viking Lander 36 aimless nobodies 36 martian landscape 36 Phobos Grunt 36 Mission Control 36 rivets 36 vertical tail fin 36 Insat 4C 36 wood putty 36 welded seams 36 outer shell 36 Undocking 36 Geostationary Operational Environmental 36 Stork Craft cribs 36 adventure Chamitoff radioed 36 monomethyl hydrazine 36 Foton M2 36 Kaleri 36 custom molded polycarbonate 36 THEMIS spacecraft 36 Mars Color Imager 36 ARCTUS 36 Solid Rocket Booster 36 Foam 36 STIS 36 asphalt shingle roof 36 pitots 36 astronaut Terry Virts 36 spacecrafts 36 magnetic particle 36 rubber grommet 36 spaceward 36 Farmyard Petting Zoo 36 shuttle Endeavour payload bay 36 exterior masonry 36 prelanding check 36 Pad Abort 1 36 debris 36 carelessly discarded smoking 36 forceps scissors 36 pitot probes 36 standpipe unattached 36 sols 36 KODAK CCD Image Sensors 36 heaviest payloads 36 charring 36 Luxiq R betamethasone valerate 36 Danny Olivas 36 Orion capsule 36 fender 36 Board CAIB 36 drummer alcove 36 duration spaceflights 36 orbiting 36 dryer vents 36 test airplane ZA# 36 Zamka 36 Extra Vehicular Activity 36 Fermi telescope 36 ejecta plume 36 hat containment dome 36 engineer Sandra Magnus 36 Israeli astronaut Ilan 36 George Zamka 36 ammonia coolant pump 36 metal sheeting 36 neoprene gloves 36 Viking landers 36 Kepler observatory 36 supercold liquid oxygen 36 Saturnian moon Titan 36 Scrub potatoes 35 Shuttle Discovery astronauts 35 vinyl sheeting 35 Jupiter Icy Moons 35 roof sheathing 35 Saturn Cassini 35 lunar landers 35 Daniel Tani 35 furring strips 35 gusset plates 35 HipCase 35 rocketships 35 wing flaps 35 Spacesuits 35 honeycomb pattern 35 Eileen Hawley 35 NASA Spacecraft 35 CRISM 35 Astronaut Daniel Tani 35 Soyuz TMA 35 LRO LCROSS 35 SIRTF 35 Space Agency 35 six wheeled rover 35 Tracy Caldwell Dyson 35 windows Calvery 35 Mars Orbiter Camera 35 stilt walker Laliberte 35 shuttle Endeavour astronauts 35 microshutters 35 orbiting Hubble Space Telescope 35 spaceflyers 35 Ares rocket 35 Webb Telescope 35 rear fender 35 airspeed sensors 35 Mars orbiting spacecraft 35 Dragon capsule 35 Alexander Kaleri 35 Paintwork 35 undercarriage 35 fireplace chimney 35 Soviet cosmonaut Valentina Tereshkova 35 Atlantis undocked 35 KSLV 1 35 abort takeoff 35 Nasa Mars Odyssey 35 halter straps 35 DFDR 35 Astronaut Lisa Nowak 35 bipod 35 Launch Complex 35 liquid hydrogen 35 Using paring knife