Early Thursday morning, Mike Stratton awoke to the sound of his cellphone ringing. It was his wife, Cassie Stratton, on the other end, speaking frantically about their condo building shaking. She told him she saw a sinkhole where the pool out her window used to be. Then the line went dead. “It was 1:30 a.m., I’ll never, never forget that,” he said. Monday was the last time Mike saw Cassie, when he departed Miami on a business trip to Washington, D.C. Now she is one of the 159 people unaccounted for, feared to be trapped under the rubble of the collapsed Champlain Towers South condo building at 8777 Collins Ave. as Miami-Dade search and rescue teams continue looking for those still alive.