Israeli Defence Minister Ehud Barak and U.S. Vice President Joe Biden (R) meet at the 49th Conference on Security Policy in Munich February 2, 2013. Senior U.S., Russian and U.N. officials, along with the leader of the Syrian opposition, were all expected in Munich on Saturday, providing a rare opportunity for talks to revive efforts to end the civil war in Syria. REUTERS/Michael Dalder (GERMANY - Tags: MILITARY POLITICS TPX IMAGES OF THE DAY)