Monday brought tears of joy and of pain in Israel and Gaza , as all of the living Israeli hostages and four of those who died in  captivity were handed over by Hamas in exchange for the release of nearly 2,000 Palestinian detainees and prisoners held by Israel. But as the ceasefire brokered by President Trump held on Tuesday, there were a number of unresolved issues testing his plan to turn it into a sustainable peace. Thousands of desperate Gazans were still waiting for vital humanitarian