Paula and Ed Kassig, parents of U.S. aid worker Peter Kassig, walk toward microphones before reading a statement to the press in Indianapolis

Paula and Ed Kassig, parents of U.S. aid worker Peter Kassig who was beheaded by Islamic State militants, walk toward microphones before reading a statement to the press in Indianapolis, Indiana, November 17, 2014. The parents asked for prayers for other captives in Syria and Iraq in a brief public statement at their Indianapolis church. REUTERS/Brent Smith