The latest attacks in Gaza come after Israel rejected a U.N. request for a brief humanitarian pause. The United Nations says at least 75 percent of the dead are civilians, including an estimated 168 children. In the last two days, Palestinian children have been killed at a rate of one per hour. More than 4,500 Palestinians have been wounded, and more than 150,000 have been displaced. Israel’s recent targets have included an apartment building where 19 children from one family were killed, mosques, a hospital and Gaza’s sole power plant. The United Nations says that a school for girls has been hit for the second time in three days.