Related by context. Frequent words. (Click for all words.) 71 hijacked planes 69 hijacked airliners 52 jetliners 51 airliners 50 twin towers 49 Twin Towers 48 Airlines Flight 48 commercial airliners 47 suicide hijackings 47 terrorist attacks 45 suicide bombers 45 hijackers 44 commercial jetliners 43 jumbo jets 42 USS Cole 42 airplanes 42 terrorists 42 Shanksville Pa. 41 jetliner 41 planes 41 TWA Flight 41 jumbo jet 40 hijacked 40 Mohamed Atta 39 Airways Flight 39 bombers 39 Mohammed Atta 38 bomber Timothy McVeigh 38 WTC 38 airliner 38 homegrown terrorists 38 terror 37 hijackings 37 Al Qaeda operatives 37 al Qaida operatives 37 pitcher Cory Lidle 37 al Qaeda operatives 37 terrorist 37 pre-#/# 36 Suicide bombers 36 box cutters 36 bin Laden 36 suicide attackers 36 airplane 36 Airlines jetliner 36 foiled plot 36 Moussaoui 36 Khobar Towers 36 Bin Laden 36 suicide bombings 35 simultaneous bombings 35 commuter trains 35 Comair Flight 35 post-#/# [001] 35 shoe bomber 35 Continental Connection Flight 35 Osama bin Laden 35 mass destruction 34 radical Islamists 34 subway trains 34 bombing 34 Osama Bin Laden 34 plane 34 explosives laden 34 mastermind Khalid Sheikh Mohammed 34 jihadists 34 hijacking 34 liquid explosives 34 Terrorists 34 skyscrapers 34 Flight 34 hijack 34 mushroom clouds 34 Lidle 33 space shuttle 33 Jihadists 33 Islamic extremists 33 Moscow Domodedovo airport 33 Columbine 33 Cuban airliner 33 explosive vests 33 attacks 33 JFK Airport 33 simultaneous explosions 33 Detroit bound airliner 33 Bali bombings 33 Timothy McVeigh 33 Sullenberger 33 Shanksville 33 Mayor Rudolph Giuliani 33 anthrax scare 33 aircrafts 33 detonate bombs 33 Freedom Tower 33 US bound airliner 33 aircraft 33 Israeli warplanes 32 REAL ID Act 32 LaGuardia Airport 32 mastermind Osama bin 32 WMDs