Israeli warplanes and helicopters have attacked the Gaza Strip for a third day in a row. More than 310 Palestinians have been killed since Saturday, and 1,400 have been wounded. Saturday was the deadliest day in Gaza since Israel’s occupation of the territory in 1967. Israel’s defense minister Ehud Barak said today that Israel was in an “all-out war against Hamas.” Israel has bombed every major town in Gaza, including Gaza City, Khan Younis and Rafah, and is now threatening to launch a ground invasion as Israeli troops and tanks move to the border. On Sunday, the Israeli cabinet called up 6,500 reserve forces. Overnight, Israeli warplanes bombed Gaza’s Interior Ministry and the Islamic University in Gaza City. A separate Israeli bombing killed four young Palestinian girls from the same family. Palestinian officials say at least twenty-two children have been killed and more than 235 children have been wounded since Saturday.