They've pledged to raise the banner of Allah over every inch of Palestine. They reject Israel's right to exist. And now the Palestinians have voted them into power. In a journey across Gaza and the West Bank, Kate Seelye, a veteran Mideast reporter, gains special access to Hamas, talking with jailed leaders, party strategists, and militant hard liners to uncover how this Islamist party rose to power and if it will restrain its terrorist wing.