For a second day, Israeli aircraft have pounded what they say are Hamas targets in Gaza. The death toll has risen to at least 280, among them women and children.

Hamas has vowed not to cave in, but Israel's operation could soon escalate. Tanks have massed at the Gazan border, and Ehud Olmert's office says military reservists are being mobilised.

The UN Security Council has demanded an immediate end to the violence, and Egypt is trying to broker a ceasefire. But the airs raids are continuing, as Clayton Swisher reports.