EDS NOTE: GRAPHIC CONTENT - This image made from video posted on the Internet by Islamic State militants and provided by the SITE Intelligence Group, a U.S. terrorism watchdog, on Saturday, Sept. 13, 2014, purports to show British aid worker David Haines before he was beheaded. The video emerged hours after the family of Haines issued a public plea on Saturday urging his captors to contact them. The 44-year-old Haines was abducted in Syria in 2013 while working for an international aid agency. (AP Photo)

Video shows slaying of British aid worker

BEIRUT (AP) — Islamic State extremists released a video showing the beheading of British aid worker David Haines, who was abducted in Syria …