Related by context. Frequent words. (Click for all words.) 50 hijacked airplanes 46 hijacked planes 45 hijacked airliners 44 hijack 42 foiled plot 42 commercial airliners 41 box cutters 41 smuggle explosives 39 airplanes 39 hijacked airliner 38 airliners 38 jumbo jets 37 commercial jetliners 37 flowcharts 37 commandeer 37 strafe 37 pulverize 36 planes 36 jetliners 36 terrorists 35 Islam holiest 35 Shanksville Pennsylvania 35 hijacked jetliners 35 detonate bombs 35 suicide hijackings 35 hijacking 34 sow chaos 34 detonate 34 Terrorists 34 hijacked 34 al Qaida operatives 34 maim 34 terrorize 34 hijackers 34 Al Qaida operatives 34 plotting 34 dozens 34 mastermind Khalid Shaikh Mohammed 34 Sears Tower 33 Twin Towers 33 terrify 33 suicide bombers 33 detonate explosives 33 manuals 33 Airlines Flight 33 unmanned drones 33 skyscrapers 33 twin towers 33 airliner 33 innocents 33 Nigerian Umar Farouk 33 Amsterdam Schiphol airport 33 cockpits 33 commandeered 33 detonating explosives 33 stealth bombers 32 jihadists 32 Al Qaeda operatives 32 liquid explosives 32 diagrams 32 explosives laden 32 terrorist attacks 32 Hijackers 32 foiled plots 32 pilotless drones 32 subways 32 assassinate 32 destroy 32 Dhiren Barot 32 blueprints 32 attacks 32 Islamic extremists 32 waging jihad 31 suicide bombings 31 Suicide bombers 31 Islamic radicals 31 annihilate 31 heavily armed 31 hundreds 31 commandos 31 paralyze 31 jetliner 31 decapitating 31 playbooks 31 airplane 31 encircle 31 Al Quaeda 31 sprayed bullets 31 conspirator Zacarias Moussaoui 31 printouts 31 Abdulla Ahmed 31 US bound airliner 31 terror 31 infiltrate 30 Ramzi Yousef 30 frighten 30 transatlantic airliners 30 decapitate 30 al Qaeda 30 hijackings 30 incapacitate