An Israeli artillery shell is fired at the border with Gaza on Friday near Sderot, Israel. Late Thursday night Israeli forces escalated their operation with a ground offensive, sending troops into Gaza. More than 250 Palestinians have lost their lives since Israel began operation "Protective Edge." Ilia Yefimovich/Getty Images hide caption

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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

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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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Israeli army flares fall into Gaza on Monday, the seventh day of the current fighting between Israel and Palestinians. Jack Guez/AFP/Getty Images hide caption

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A key, symbolizing the Palestinians who lost their homes at the creation of the state of Israel in 1948, sits at the entrance of the West Bank city of Jericho, on Feb. 22. Thomas Coex/AFP/Getty Images hide caption

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Nimrod Vider, an Israeli who owns a cafe in the Jordan Valley, part of the Israeli-occupied West Bank. He says he would be willing to leave the West Bank if the Israeli government thought it was the right thing to do. Emily Harris/NPR hide caption

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Abdel Hamid el-Rajoub, a Palestinian, became an informant for Israel while serving time in an Israeli prison. Palestinian informants play a key role in the Israeli-Palestinian conflict, though both sides can be reluctant to speak about it. Rajoub, who now lives in Israel, says he is no longer an informant. Emily Harris/NPR hide caption

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Palestinians protest in the center of the West Bank city of Ramallah against the continuation of negotiations with Israel, and demand that Palestinian president Mahmud Abbas not meet with U.S. Secretary of State John Kerry on Jan. 15, 2014. Abbas Momani/AFP/Getty Images hide caption

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Palestinian travelers wait to cross into Egypt at the Rafah crossing terminal in the southern Gaza Strip earlier this month. Said Khatib/AFP/Getty Images hide caption

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A view of a tunnel reportedly dug by Palestinians beneath the border between the Gaza Strip and Israel and recently uncovered by Israeli troops, on Sunday. David Buimovitch /AFP/Getty Images hide caption

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An image taken from an amateur video shows an Israeli soldier dancing atop a Palestinian man's shoulders to the song "Gangnam Style." The soldier and his colleagues have been suspended. YouTube hide caption

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Palestinian Bashir Tamimi, 57, drinks water from a spring on land that he says belongs to his family. Teenagers from a nearby Israeli settlement built collection pools and brought in picnic tables when they saw no one using the spring. It has now become a source of conflict. Emily Harris/NPR hide caption

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Yusra Hammed, 15, puts the finishing touches on a drawing on a wall inside her family's home in Silwad, a village in the West Bank. Hammed says, like many Palestinian girls, she does not throw rocks at Israeli soldiers; but she expresses her opposition through alternate channels, such as art. Emiliy Harris/NPR hide caption

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