Smoke billows from the site of an Israeli airstrike in Gaza City, November 21, 2012.

A Palestinian man reacts as flames and smoke rise from a smuggling tunnel after an Israeli strike along the border between Egypt and Rafah in the southern Gaza Strip, November 21, 2012.

Israelis look at a blown up bus at the site of a bombing in Tel Aviv, Israel, November 21, 2012.

Israeli rescue workers and paramedics carry a wounded person from the site of a bombing in Tel Aviv, Israel, November 21, 2012.

Palestinian children stand in rubble after an Israeli strike on a house in Gaza City, November 20, 2012.

An Israeli soldier stands on a tank at a staging area near the Israel-Gaza Strip Border, November 20, 2012.

A Palestinian inspects the damage to a soccer stadium after an Israeli air strike in Gaza City, November 19, 2012.

Smoke and fire rise up from an explosion in Gaza City, November 19, 2012.

A Palestinian man waves the national flag during a protest against Israel's operations in Gaza Strip, outside Ofer, an Israeli military prison near the city of Ramallah, November 18, 2012.

An Israeli police officer gestures in front of a burning car after a rocket fired by Palestinian militants in Gaza landed in the southern city of Ashkelon, November 18, 2012. (Reuters)

Members of the Palestinian Civil Defense help a survivor after he was pulled out from under the rubble of his destroyed house after an Israeli air strike in Gaza City, November 18, 2012.

An Iron Dome launcher fires an interceptor rocket in the southern city of Ashdod, Israel, November 16, 2012.

A Palestinian man kisses the body of one of his children during their funeral in the northern Gaza Strip, November 18, 2012.

An Israeli soldier runs with his weapon during a drill simulating a possible ground invasion into the Gaza Strip, at a base south of the West Bank city of Hebron, November 17, 2012.