Secretary of State John Kerry speaks during a meeting with Brazilian Foreign Minister Antonio de Aguiar Patriota at the State Department in Washington Monday, May 20, 2013. Kerry is heading back to the Middle East this week to press his case for peace talks between Syrian rebels and President Bashar Assad's regime amid increasing signs the new U.S. strategy to halt the war is being undermined by Russia. (AP Photo/Evan Vucci)
** FILE ** This Wednesday, Aug. 19, 2009, file photo shows Syrian President Bashar Assad, seen, during a meeting with his Iranian counterpart Mahmoud Ahmadinejad, unseen, at the presidency in Tehran, Iran. (AP Photo/Vahid Salemi, File)
** FILE ** This Wednesday, Aug. 19, 2009, file photo shows Syrian President Bashar Assad, seen, during a meeting with his Iranian counterpart Mahmoud Ahmadinejad, unseen, at the presidency in Tehran, Iran. (AP Photo/Vahid Salemi, File)
** FILE ** President Bashar Assad speaks during an interview, April 17, 2013. (AP Photo/Syrian State TV via AP video, File)
** FILE ** President Bashar Assad speaks during an interview, April 17, 2013. (AP Photo/Syrian State TV via AP video, File)
** FILE ** President Bashar Assad speaks during an interview, April 17, 2013. (AP Photo/Syrian State TV via AP video, File)
Indonesian U.N peacekeepers patrol the Lebanese side of the Lebanese-Israeli border in the southern village of Kfar Kila, Lebanon, Tuesday May 7, 2013. President Bashar Assad's regime has given a Palestinian militant group the go-ahead to set up missiles to attack Israel in the wake of recent Israeli airstrikes on the Syrian capital, a spokesman for the group said Tuesday.
An Syrian man wrapped in a Syrian flag with a portrait of President Bashar Assad, walks past anti riot police during an anti-Israeli demonstration in front of the U.N. office in Tehran, Iran, Monday, May 6, 2013. (AP Photo/Ebrahim Noroozi)
An Syrian man wrapped in a Syrian flag with a portrait of President Bashar Assad, walks past anti riot police during an anti-Israeli demonstration in front of the U.N. office in Tehran, Iran, Monday, May 6, 2013. (AP Photo/Ebrahim Noroozi)
