A masked Palestinian throws back a gas canister during a protest to support Palestinian prisoners, outside Ofer, an Israeli military prison near the West Bank city of Ramallah, Friday, Feb. 22, 2013. (AP Photo/Majdi Mohammed)

Photo by: Majdi Mohammed

A masked Palestinian throws back a gas canister during a protest to support Palestinian prisoners, outside Ofer, an Israeli military prison near the West Bank city of Ramallah, Friday, Feb. 22, 2013. (AP Photo/Majdi Mohammed)