FBI and DHS Urge Vigilance on July 4

The FBI and the Department of Homeland Security have issued their annual summer holiday "Security Awareness" Bulletin, a six-page document that notes that just last year al Qaeda had identified the July Fourth weekend as ideal for an attack, and urges vigilance, but stresses there is no "specific or credible information" that al Qaeda or its affiliates have any plans to disrupt Independence Day.

"As of February 2010, al Qaeda was contemplating large attacks in the homeland on symbolic dates and specifically identified U.S. Independence Day as a key date," the bulletin says.