The shadow of a Palestinian boy is seen against a fabric sheet as he plays on a swing during a summer camp organized by Hamas movement in Gaza City June 16, 2013. Tens of thousands of children from the Gaza Strip spend at least part of their holidays in special summer camps, arranged around a wide array of activities. Some, organised by the United Nations, offer sports, art and dance classes. Others, laid on by Gaza's Islamist rulers Hamas, include fun and games, while seeking to reinforce religious values and awareness of the conflict with Israel. Picture taken June 16, 2013. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS EDUCATION SOCIETY)