Reconstruction in Gaza, where heavy Israeli bombardment in a war with Islamist militant group Hamas, has destroyed thousands of buildings, damaged water, sewage, and power infrastructure, and displaced about 300,000 people, will cost at least $6 billion, the Palestinian deputy prime minister says. This time, Mohammed Mustafa said, Palestinians hope donors to the reconstruction effort will make good on aid pledges. In 2009, only a fraction of the nearly $5 billion in funds pledged at an international conference after a three-week war between Israel and Hamas actually arrived in Gaza.