“We’ll come back U.S.A. One day only 11/9/2011,” says one message, featuring a photo of Osama bin Laden, using the date/month formula to reference Sept. 11.
“We’ll come to u white house sooooooooooon,” says another.
“We’ll come back 11/9/2011 to kill u all,” a third posting reads. The posts appeared briefly and were taken down.
Secret Service spokesman Ed Donovan said the agency has referred the messages to its internet threat desk…