Covering the White House and U.S. politics for Reuters
Obama says US will be "relentless" in its response to Islamic State militants
Obama says he has spoken to the Foley parents, condemns Islamic State militants. "ISIL speaks for no religion," he says
“We have reached the judgment that this video is authentic," said NSC spokeswoman Caitlin Hayden re Foley beheading.
Pres Obama was briefed while on AF1 about the video showing a purported beheading, per WH's Schultz
White House says intel community working to see if beheading video is legitimate. Obama just landed on Martha's Vineyard.