Palestinian boys perform exercises at a summer camp run by Palestinian Islamic organization Hamas near the border between Gaza and Egypt in Rafah, Gaza Strip, June12, 2013.

Hamas camps for children and youths in the Gaza Strip start in June every year. Hamas teach the children athletic games, scouts activities, reading, hunting, basic military exercises, as well as providing religion classes.

Palestinian boys listen to an instructor demonstrating how to use an assault rifle.

Palestinian boys, pictured through a canvas which provides shade to Hamas camp instructors, perform exercises at the camp.

A Palestinian teacher speaks in class at a school in Gaza City on April 2.

Palestinian school children raise their hands during a class in al-Qahera elementary school in Gaza City on April 2. New rules from the Education Ministry of the Islamist Hamas movement ruling the Gaza Strip will bar men from teaching at girls' schools and mandate separate classes for boys and girls from the age of nine.

Palestinian school girls and boys walk in front of a United Nations Relief and Works Agency elementary school in Shati refugee camp in Gaza City, on April 2. Gaza's Hamas-controlled parliament has passed a law requiring separate classes for boys and girls in public and private schools from the fourth grade. Currently, boys and girls are separated in grade seven in public schools, but private schools can set their own rules.

Hamas chief Khaled Meshaal gestures to the crowd during a rally marking the 25th anniversary of the founding of Hamas in Gaza City on Dec. 8.

Hamas chief Khaled Meshaal, left, and senior Hamas leader Ismail Haniyeh, right, wave to the crowd as they leave a rally in Gaza City on Dec. 8.

Young Hamas supporters attenda rally for the 25th anniversary of the ruling party in Gaza City on Dec. 8.

A Palestinian woman gestures during a rally marking the 25th anniversary of the founding of Hamas in Gaza City.

A Palestinian boy wearing a military suit and acarrying mock missile shakes hands with Hamas chief Khaled Meshaal during a rally marking the 25th anniversary of the founding of Hamas in Gaza City on Dec. 8.

A Palestinian prisoner is greeted by an unidentified relative after his release at the Rafah border crossing in southern Gaza Strip on Sunday, Dec. 18. Israel released hundreds of Palestinian prisoners late Sunday, the second and final phase of a swap with Gaza Hamas militants that brought home an Israeli soldier after five years in captivity.

Released Palestinian prisoners celebrate as they arrive to the West Bank city of Ramallah, early Monday, Dec. 19. Israel released hundreds of Palestinian prisoners late Sunday, the second and final phase of a swap with Gaza Hamas militants that brought home an Israeli soldier after five years in captivity.

A freed Palestinian prisoner is greeted by people upon arrival at Rafah crossing in the southern Gaza Strip on Dec. 18. Israel plans to release 550 Palestinian prisoners on Sunday in the second stage of a deal with Hamas that brought home soldier Gilad Shalit after five years of captivity in the Gaza Strip.

A Palestinian prisoner celebrates during his release on Dec 18 in Ramallah, West Bank. Israel released 550 Palestinian prisoners to complete a swap deal which brought about the release of captive soldier Gilad Shalit.

In this photo released by the Israeli Government Press Office, released Israeli soldier Gilad Shalit, center, salutes as he is welcomed by Israeli Prime Minister Benjamin Netanyahu, left, at the Tel Nof Air base in southern Israel on Oct. 18. Looking thin, weary and dazed, the Israeli soldier returned home Tuesday from more than five years of captivity in the Gaza Strip in exchange for hundreds of Palestinian prisoners whose joyful families greeted them with massive celebrations.

Israeli supporters of captive soldier Gilad Shalit celebrate on his arrival to his home on October 18 in Mitzpe Hila, Israel. Shalit was freed after being held captive for five years in Gaza by Hamas militants, in a deal which saw Israel releasing more than 1,000 Palestinian prisoners

Israeli President Shimon Peres, right, hugs Noam Schalit, center, the father of captured Israeli soldier Gilad Schalit, as his wife Aviva looks on, at the President's residence in Jerusalem, Wednesday, Oct. 12. Israeli euphoria over a prisoner swap deal to free a soldier held by Hamas militants for five years gave way on Wednesday to a growing anxiety that the release of 1,000 Palestinian prisoners, some of them convicted of murder, could lead to a new round of violence.

Palestinians celebrate a deal that will see Palestinian detainees freed in exchange for captured Israeli soldier Gilad Schalit on October 12 in Gaza City.

Palestinians demonstrate in support of Palestinian prisoners held in the Israeli jails, on October 12 in the West Bank city of Hebron.

Palestinian women take part in a rally calling for the release of their sons held in Israeli jails, inside the headquarters of the International Red Cross in Gaza City October 12.

Members of Hamas national security forces patrol a street as they celebrate a prisoner swap between Hamas and Israel, in Gaza City October 12.

Palestinian Hamas members carry the body of senior Hamas militant Ismail Lubad, 42, during his funeral in Al Shatea refugee camp in the west of Gaza City on Saturday, April 2. Three Hamas militants were killed early Saturday in an Israeli airstrike on a car they were travelling in near the southern Gaza Strip city of Kahn Younis, doctors and Hamas sources said. The Israeli airstrike came a few days of relative calm. Last month the Gaza Strip witnessed an escalation of violence between Israel and Gaza militants, where at least 13 Palestinians were killed and more than 30 wounded. Around 30 Israelis were injured.

Palestinian relatives of senior Hamas militant Ismail Lubad, 42, react during his funeral in Al Shatea refugee camp in the west of Gaza City on Saturday.