MAE SAI, Thailand (AP) — The Thai boys saved from a flooded cave endured dives in zero visibility lasting up to half an hour. In places, they were put into harnesses and high-lined across rocky caverns, said a leader of the U.S. contingent involved in the operation, calling it a "once in a lifetime rescue."

Derek Anderson, a 32-year-old rescue specialist with the U.S. Air Force based in Okinawa, Japan, said the dozen boys, ranging in age from 11 to 16, and their coach, who were trapped for more than two weeks before being rescued this week, were "incredibly resilient."

"What was really importa...