Related by context. Frequent words. (Click for all words.) 31 heightened alert 27 tropical storm warning 24 Patrols 24 blizzard warning 24 flight cancellations 23 alert 23 manhunt 22 patrolled 22 massive manhunt 22 stay indoors 22 arrests 22 stationed 21 diplomatic missions 21 patrols 21 bomb sniffing dogs 21 tenterhooks 21 warnings 21 advisories 21 evacuated 20 foiled 20 vigil 19 security 19 foiled plot 19 undue reliance 19 precaution 19 retaliatory attacks 19 tornado warnings 18 untoward incident 18 precautions 18 Independence Day 18 standby 18 cordons 18 mandatory evacuation order 18 Evacuations 18 Homeland Security Secretary 18 precautionary measure 18 remain vigilant 18 reprisal attacks 18 lookout 18 imposed curfew 18 patrolling 18 evacuations 18 heightened 17 cordoned off 17 mandatory evacuation 17 evacuate 17 patrol 17 precautionary measures 17 sirens 17 beefed 17 riot gear 17 travel advisories 17 arrest 17 contingency 16 vigilance 16 metal detectors 16 festive mood 16 Warnings 16 voluntary evacuation 16 surveillance 16 emergency preparedness 16 curfew 16 hiring freeze 16 preparedness 16 alerted 16 lockdown 15 layoff notices 15 crackdown 15 Curfew 15 warning 15 threats 14 jittery 14 cordon 14 attacks 13 vigilant 13 quarantine 13 radiological 12 evacuation 12 disruptions 12 clampdown 12 threat 12 terror 11 anonymous caller 11 preventive measures 11 precautionary 10 quarantines 10 subways 10 barricades 10 terrorist attacks 10 massing 10 curfews 10 provocations 9 watchful 9 pickets 8 disruption 8 blockades 8 false alarms 8 siege 8 barricaded 5 explosive device 5 false alarm