Beyond that, Napolitano declined to provide specifics. “I don’t want to give those [details] out because I don’t want to tell the bad guys exactly what we’re doing,” she said. “But I think it’s fair to say that in addition to asking citizens to be vigilant and so forth, that we have ourselves leaned forward and have made sure that we are doing all that we can.”
Some additional information has leaked out, however, including “a possible plot directed at the homeland that seems to be focused on New York and Washington, D.C.,” a senior Obama administration official told CNN, adding that the threat is believed to involve three trained terrorists and a vehicle laden with explosives. The would-be terrorists are believed to be coming from Afghanistan, but it's not known whether they have yet entered the United States.
On the heels of the trove of documents uncovered by US Navy SEAL Team Six during their raid of Osama bin Laden’s house, senior administration officials issued a government advisory in May. The bulletin, put out by the Federal Bureau of Investigation and the Department of Homeland Security (DHS), warned that, as far back as February 2010, Al Qaeda was contemplating “an operation against trains at an unspecified location in the United States on the 10th anniversary” of the 9/11 attacks.