US intelligence agencies and law enforcement has to be right 100 percent of the time; Al Qaeda only needs to be right once. There's the best reason to expect that there will again be a successful terror attack in the US:
A secret U.S. law enforcement report, prepared for the Department of Homeland Security, warns that al Qaeda is planning a terror "spectacular" this summer, according to a senior official with access to the document.
"This is reminiscent of the warnings and intelligence we were getting in the summer of 2001," the official told ABCNews.com.
There's not much here to affect the way you live your life -- no specifics about number of attacks, timing, possible nature of the attacks -- or anything. And it's important to remember that chatter has been described as approaching pre-9/11 levels several times since those attacks -- to no effect, so far.
Let's hope and pray this turns out the same.