Threats Left on White House Facebook Page 'We'll come back,' says one By Polly Davis Doig, Newser Staff Posted Sep 11, 2011 1:09 PM CDT 29 comments Comments This screenshot from the White House's Facebook page shows threats posted earlier today. (Facebook) (Newser) – Amid heightened security as the nation marks a decade since 9/11, feds are investigating threats posted on the White House's Facebook page, reports NBC New York. "We'll come back U.S.A. One day only 11/9/2011," says one post, which shows a photo of Osama bin Laden. The second and third: "We'll come to u white house sooooooooooon," and "We'll come back 11/9/2011 to kill u all." As the AP reports, White House counterterror adviser John Brennan says the administration is taking the threat of an attack today very seriously, calling a previously reported threat "specific and credible," but not "confirmed." "This is a 24/7, round-the-clock effort by all elements of the US counterterrorism community both here in the United States as well as abroad." In other news, feds are questioning a man in Kansas City after finding a suspicious object in his bag. He was uncooperative, notes the AP.