Official threat level is unchanged, but security is tight at airports, subways, and other gathering spots, in wake of Bin Laden killing. 'Revenge is very important' to jihadists, warns one expert.
Historically vulnerable cities like New York claim they need more anti-terrorism funds. After Faisal Shahzad's attempted Times Square bombing, will the Department of Homeland Security agree?
Like the Christmas Day 'underwear bomber,' the Times Square bomber apparently bungled the job. The 9/11 attacks might have led to a false sense of terrorists' competence.
Video cameras, fingerprints, and chemical clues could all come into play as authorities try to identify who drove an explosives-laden vehicle into Times Square. The bomb plot left behind plenty of evidence.
Analysts debate the rhetoric of war as part of the fight against terrorism.