Related by context. Frequent words. (Click for all words.) 62 shuttle Challenger 52 Christa McAuliffe 48 Columbia disintegrated 48 liftoff 47 space shuttle 47 Space Shuttle Challenger 46 Space Shuttle Columbia 44 Space Shuttle Discovery 43 astronauts 42 Caldwell Dyson 42 Rick Husband 41 Sputnik 41 director Mike Leinbach 41 Kalpana Chawla 41 Apollo astronauts 41 Columbia Accident Investigation 41 Eileen Collins 41 Sriharikota 41 astronauts aboard 40 By trevor 40 shuttle 40 Kennedy Space 40 shuttle fleet 40 NASA Administrator 39 Satish Dhawan Space 39 blastoff 39 Russian Soyuz rocket 39 Space Shuttle Endeavour 39 Titanic sank 39 Ilan Ramon 39 shuttle Discovery 39 shuttle missions 39 Leinbach 39 Space Shuttle 38 spacecraft 38 Cape Canaveral 38 Soyuz capsule 38 astronaut 38 Alan Shepard 38 Posted -# sec 38 Schirra 37 Space Shuttle Atlantis 37 space shuttle Discovery 37 solid rocket boosters 37 Gagarin 37 booster rockets 37 Baikonur Cosmodrome 37 NASA 37 shuttle Endeavour 37 Shuttle Launch 37 fiery gases 37 shuttle astronauts 37 Cape Canaveral Air Force 37 Yuri Gagarin 37 eyes welled 36 Liftoff 36 rig exploded 36 Readdy 36 orbiter 36 By Irene Klotz 36 SpaceShipOne 36 tank foam insulation 36 Cape Canaveral Fla. 36 Mission Control 36 Horizon rig exploded 36 NASA Space Shuttle 36 Mission Specialists 36 Cernan 36 Kourou French Guiana 36 polar orbit 36 space shuttle Atlantis 36 shuttle Atlantis 36 Buzz Aldrin 36 McAuliffe 36 Launch Complex 36 lunar module 36 manned spacecraft 35 spaceflight 35 space shuttle Endeavour 35 cried 35 teary eyed 35 Sputnik moment 35 Shuttle Discovery 35 Soyuz rocket 35 manned spaceflight 35 By GMF Editor 35 Soyuz TMA 35 By GEOFF HOBSON 34 astronautics 34 orbited 34 thermal tiles 34 X #A 34 NASA astronaut 34 Shuttle Endeavour 34 Melroy 34 crewmates 34 wept 34 KENNEDY SPACE CENTER 34 KSC 34 Endeavour astronauts 34 orbit