Last night, as President Obama was giving his jobs speech, federal authorities were confirming reports that there is a specific, credible terrorist threat for the New York City and District of Columbia areas this coming weekend. Counterterrorism officials are investigating a possible truck bomb, and New York City mayor Michael Bloomberg said in a press conference last night that he would increase security in the city, and that residents should keep their “eyes wide open.” Scott Shane, national security reporter for The New York Times, talks about what a “credible threat” means for New Yorkers and Washingtonians.