Related by context. Frequent words. (Click for all words.) 62 hijacked planes 57 Airlines Flight 55 hijacked airliners 54 hijacked airplanes 50 hijackers 49 hijacked jetliners 48 Twin Towers 47 airliners 46 twin towers 45 terrorist attacks 44 jetliner 44 jetliners 43 suicide hijackings 42 plane 41 conspirator Zacarias Moussaoui 41 hijacker 41 jumbo jet 41 USS Cole 41 airliner 40 Airlines jetliner 40 hijacked 40 Shanksville Pennsylvania 39 destroyer USS Cole 39 hijack 39 bomber 39 bombers 39 mastermind Khalid Shaikh Mohammed 39 commercial airliners 38 planes 38 Pearl Harbor Hawaii 38 Moussaoui 38 Airways Flight 37 terror 37 Comair Flight 37 shootdown 37 airplane 37 Pearl Harbor 36 Flying Fortress 36 al Qaida operatives 36 jumbo jets 36 WTC 36 hijacking 36 airplanes 36 Fighting Falcon 36 Zacarias Moussaoui 36 fighter jet 35 Ramzi Yousef 35 Marwan al Shehhi 35 hijackings 35 foiled plot 35 Beverly Eckert 35 TWA Flight 35 Shanksville Pa. 35 plane crashed 35 Khobar Towers 35 Flight 35 Transportation Safety 35 explosives laden truck 35 Pearl Harbour 35 shoe bomber 35 terrorist 35 bombing 34 warplane 34 aircraft 34 terrorists 34 takeoff 34 nightclub bombings 34 Terrorist Attacks Upon 34 Cuban airliner 34 La Guardia Airport 34 fighter planes 34 Sullenberger 34 commercial jetliners 34 al Qaeda operatives 34 fighter jets 33 plotters 33 counterterrorism 33 SEALs 33 suicide bombers 33 al Mihdhar 33 Andrew J. Barberi 33 jet 33 Almurisi 33 Cosco Busan 33 Continental Connection Flight 33 jets 33 air marshals 33 pre-#/# 33 USS Cole bombing 33 Al Qaeda operatives 32 pitcher Cory Lidle 32 crashed 32 post-#/# [001] 32 Mohamed Atta 32 Cirrus SR# 32 Moscow Domodedovo airport 32 Domodedovo airport 32 Ziad Jarrah 32 Staten Island ferry 32 crop duster 32 Holland Tunnel