from usa today: What would happen if terrorists attacked the United States at the start of Barack Obama's presidency? The Bush administration doesn't want to wait to find out. It's planning to test the incoming government's readiness next month in a series of tabletop exercises involving top Bush and Obama officials. Concerned about the first handoff of presidential power since Sept. 11, 2001, the White House also is preparing briefing books and office manuals designed to bring the incoming Obama administration up to speed in a hurry. "This is the first wartime transition in 40 years, and it's probably the first transition in a couple of centuries in which our homeland itself has been under threat," says White House chief of staff Joshua Bolten, who's supervising the effort. The goal is to "make sure that those who are coming in are as well prepared as they can be to deal with an actual threat here in this country."