As the Guadalupe River rose in Kerr County, Texas, in the early hours of July 4, Coast Guard Air Station Corpus Christi received a call to help rescue hundreds of campers in the path of a devastating flash flood. The four-person crew of Rescue 6553, an HC-65E Dolphin helicopter dispatched from the station, flew 150 miles through the dense storm, relying on instrumentation only for navigation. After attempting to reach the hardest-hit area three times -- a harrowing flight that took nearly seven