London — The day Israeli-American hostage Keith Siegel was freed after nearly 16 months of captivity at the hands of Hamas terrorists in Gaza, he tells CBS News that he denied one final demand by his captors. "I did wave. I didn't say thank you," he said in an interview at the Israeli Embassy in London on Thursday, during an event to mark 650 days since the Hamas-led terrorist attack on Oct. 7, 2023, when Siegel and 250 others were taken hostage. Siegel, who was released Feb. 1, said his captors told him he should offer them his thanks during...