Displaced Palestinian Emada Al Attar, 23, holds her 16 day-old baby boy Anous in a classroom where they sleep in a U.N. school where the family is taking refuge during the war, in Gaza City, Gaza Strip on Aug. 8. Lefteris Pitarakis/AP hide caption

itoggle caption Lefteris Pitarakis/AP

An Israeli Merkava tank near the Hamas-controlled Gaza Strip border in southern Israel, on Thursday. The Pentagon confirms that Israel tapped a U.S. weapons stockpile for tank rounds. Debbie Hill/UPI/Landov hide caption

itoggle caption Debbie Hill/UPI/Landov

During Saturday's humanitarian cease-fire, families returned to the Shejaiya district of Gaza City Saturday to find their homes ground into rubble by Israeli tank fire and air strikes. An attempt to extend the cease-fire by an additional 24 hours ended early Sunday, but Hamas said it would accept a new cease-fire, partly to acknowledge the holiday of Eid. Mahumud Hams/AFP/Getty Images hide caption

itoggle caption Mahumud Hams/AFP/Getty Images

An Israeli army officer on Friday shows journalists a Palestinian tunnel that runs from the Gaza Strip into Israel. Israel says its current military campaign is aimed at destroying the tunnels. Jack Guez/AFP/Getty Images hide caption

itoggle caption Jack Guez/AFP/Getty Images

A Palestinian man leans on his car after salvaging usable items from his destroyed house in Shuja'iyya neighborhood in east Gaza City, on Saturday. Gazans are taking advantage of a brief cease-fire with Israel. Oliver Weiken/EPA /Landov hide caption

itoggle caption Oliver Weiken/EPA /Landov

Injured Palestinian children lie on the floor of an emergency room after the U.N. school where they took refuge in the northern Gaza Strip was shelled. Lefteris Pitarakis/AP hide caption

itoggle caption Lefteris Pitarakis/AP

A Palestinian carries a wounded girl in the emergency room of Shifa Hospital in Gaza City. The city's main hospital is filled with the wounded, and many others have taken refuge on the hospital grounds. Lefteris Pitarakis/AP hide caption

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An Israeli tank advances near the Israel-Gaza Strip border on Friday as part of Israel's ground incursion in the territory. Israel launched the ground operation Thursday following more than a week of airstrikes that did not halt Palestinian rocket fire. Dusan Vranic/AP hide caption

itoggle caption Dusan Vranic/AP

Iman el-Kaas' 33-year-old husband, Anas, was killed last week by an Israeli attack that hit their apartment in the Gaza Strip. She says her husband, a pharmacist, had no ties to Hamas. He is among the nearly 200 killed so far in the current conflict. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR

Palestinian president Mahmoud Abbas has accused Israel of committing "genocide" against Palestinians, and he has also criticized Hamas for firing rockets on Israel. Abbas Momani/AFP/Getty Images hide caption

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A Palestinian boy sits on the rubble of Al-Farouk mosque, which police said was destroyed in an Israeli airstrike, in Nuseirat in the central Gaza Strip on Saturday. Ezz Zanoon/APA Images/APA/Landov hide caption

itoggle caption Ezz Zanoon/APA Images/APA/Landov

A convoy of Israeli tanks roll near Israel's border with the Gaza Strip on Friday. There's a sense of repetition to the violence in the region, as Hamas fires rockets at Israel and Israel responds with bombs and the threat of a ground invasion. Menahem Kahana/AFP/Getty Images hide caption

itoggle caption Menahem Kahana/AFP/Getty Images

Several families share this one-room underground shelter in Ashkelon, Israel, not far from the border with Gaza. The children say they're afraid to go outside. Ari Shapiro/NPR hide caption

itoggle caption Ari Shapiro/NPR

Palestinian gunmen drag a man from a motorcycle in Gaza City on Nov. 20. He was one of six men killed that day on suspicion of collaborating with Israel. The Hamas government in the Gaza Strip denied responsibility, though it has executed others judged to be working with Israel's security forces. Hatem Moussa/AP hide caption

itoggle caption Hatem Moussa/AP