Israel and Hamas: Conflict in pictures

21 of 53: Israeli soldiers march in a gathering area near the Israel Gaza Strip border, in southern Israel, Sunday, Nov. 18, 2012. President Barack Obama on Sunday defended Israel's airstrikes on the Gaza Strip, but he warned that escalating the offensive with Israeli ground troops could deepen the death toll and undermine any hope of a peace process with the Palestinians. (AP Photo/Ariel Schalit) (AP Photo/ Ariel Schalit)

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