Related by context. Frequent words. (Click for all words.) 42 liftoff 41 missile 41 lunar landing 40 spacecraft 40 Pentagon 39 orbiter 39 flyby 39 blastoff 38 Quadrennial Defense Review 37 detonation 37 lunar orbiter 37 impactor 36 Space Shuttle 36 missile launches 36 manned spaceflight 36 declassified 36 hydrazine 36 Nasa 35 Taepodong 2 35 NASA 35 CIA 35 Strategic Command 35 polar orbit 34 payload 34 hijackings 34 spokesman Bryan Whitman 34 space shuttle 34 suicide hijackings 34 Declassified 34 warfighting 34 hijacking 33 reentry 33 heat shield 33 manned spacecraft 33 spacecrafts 33 Chandrayaan 33 Chang'e 33 unclassified 33 human spaceflight 33 coup d' état 33 assassination 33 astronauts 32 Space Shuttle Program 32 Soyuz capsule 32 landing 32 missions 32 lander 32 airliners 32 espionage 32 Combat Command 32 thermal tile 32 NASA Administrator 32 spaceflight 32 warhead 32 hostages 31 precision guided munitions 31 takeoff 31 hijacked airplanes 31 JAXA 31 cyberattacks 31 shuttle missions 31 briefers 31 crash 31 airliner 31 DOD 31 bombers 30 suborbital flight 30 commercial airliners 30 assassination attempt 30 splashdown 30 kiloton 30 Columbia Accident Investigation 30 combatant commanders 30 orbiting 30 Dittemore 30 hijacked airliners 30 booster rocket 30 orbit 30 bombing 30 undocking 30 NPOESS 30 Readdy 30 Columbia disintegrated 29 Liftoff 29 Orbiter 29 Gerstenmaier 29 launchings 29 detonations 29 Spacecraft 29 lethality 29 cyberwar 29 commercial jetliners 29 GAO 29 Cape Canaveral Fla. 29 Mission Control 29 JFCOM 29 declassifying 29 lunar orbit 29 SpaceX 29 lunar missions 29 counterproliferation