(SAVANNAH, Ga.) — A small coastal city in Georgia that thrives on tourism closed its beach, fearing carefree crowds of teenagers and college students posed too great a risk for spreading the new coronavirus. Two weeks later, the state’s governor has reversed that decision, saying people weathering the outbreak need fresh air and exercise. The clash has thrust tiny Tybee Island, east of Savannah, into a thorny debate that keeps cropping up during the coronavirus pandemic: How much can officials curtail freedoms during the crisis?