101 points | After five American citizens were killed and four were wounded in the attack on Hebrew University in Jerusalem, several thousand supporters of Hamas, which took credit for the bombing, celebrated with a march through Gaza streets. They had more to cheer about when, early on Aug. 4, Hamas terrorists detonated a shrapnel-packed explosive on a bus in northern Israel, killing nine and injuring another 35. Several other Israelis were killed in isolated attacks. In response, Israeli officials said they would ban travel in the northern part of the West Bank and sent tanks to seal off refugee camps. "Nobody enters and nobody leaves," vowed Defense Minister Binyamin Ben-Eliezer, but he also met with Palestinian interior minister Abdel Razak Yehiyeh to discuss a ceasefire that would spur the Israeli army to withdraw from Palestinian areas. Despite the violence, U.S. officials declared they would still meet with Palestinian leaders to discuss peace.