This graphic shows the overlay of Coast Guard search and rescue efforts for Tristen Allen, an 18-year-old diver who was reported missing off Folly Beach, S.C., Saturday, July 12, 2014. Coast Guardsmen aboard planes, helicopters, boats and cutters saturated the search area, covering more than 2,759 square miles over a 53-hour period, and found no signs of Allen before ending the search at sunset Monday, July 14, 2014. (U.S. Coast Guard graphic)
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