An alleged Palestinian collaborator with Israel poses for the camera inside a Hamas-run prison in Gaza City April 23, 2013. The Islamist Hamas government, which is pledged to Israel's destruction by force of arms, is lauding a recent campaign to root out informants in its midst, which it hopes will deprive Israel of a subtle but effective tool. Picture taken April 23, 2013. To match Feature PALESTINIANS-HAMAS/SPIES REUTERS/Suhaib Salem (GAZA - Tags: POLITICS)