SimilarityRank
after_9_/_[number] 0.773 41674
post-9_/_[number] 0.740 87391
the_9_/_[number]_attack 0.703 41728
the_War_on_Terror 0.674 63478
the_war_on_terror 0.661 47377
terrorist_attack 0.641 15398
counterterrorism 0.618 58849
after_September_[number] 0.608 75057
terrorist_threat 0.593 56862
terror_attack 0.586 43895
terrorism 0.586 3838
on_9_/_[number] 0.581 46096
Al_Qaeda 0.581 20556
9_/_[number] 0.578 7060
since_World_War_II 0.577 67848
the_war_in_Afghanistan 0.575 63087
counter-terrorism 0.573 55418
Jihadist 0.567 86110
the_Department_of_Homeland_Security 0.561 38433
the_war_in_Iraq 0.560 31207
Homeland_Security 0.559 29809
al_Qaeda 0.556 26461
al-Qaeda 0.555 20896
Al-Qaeda 0.555 34126
the_American_military 0.552 93373