Hamas freed three hostages from Gaza and Israel released 183 prisoners and detainees on Saturday, the fifth exchange under a fragile, three-week-old ceasefire deal. The gaunt appearance of the three Israeli men shocked the country, sparking anger and dismay that could increase pressure on the prime minister, Benjamin Netanyahu, to extend the agreement to a second stage, bringing home the remaining Israeli captives. The Israeli leader may face a choice between keeping his government or sealing a second stage of the ceasefire, which under a framework plan would see all hostages freed and Israeli forces pulling out of Gaza. The...