Hamas on Saturday released four Israeli soldiers they held captive for 15 months in a planned exchange for 200 Palestinian prisoners or detainees in Israel. A handover took place in Gaza City where Hamas and Red Cross workers signed documents before the hostages left in Red Cross vehicles. It's the second exchange since a ceasefire took effect last weekend, halting the fighting in Gaza for at least six weeks during which dozens of Israeli hostages and hundreds of Palestinian prisoners will be freed while more aid flows in. In return for the four soldiers, Israel should free 200 Palestinian prisoners or detainees, including 120 Hamas members serving life sentences after being convicted of deadly attacks.