When Jessica and Derek Simmons first saw the beachgoers pausing to stare toward the water, the young couple just assumed someone had spotted a shark.
It was the evening of July 8, after all, peak summer season in Panama City Beach for overheated Florida tourists to cross paths with curious marine life. Then they noticed flashing lights by the boardwalk, a police truck on the sand and nearly a dozen bobbing heads about 100 yards beyond the beach, crying desperately for help.
Six members of a single family -- four adults and two young boys -- and four other swimmers had been swept away by a powerful and deceptive riptide churning below the water's surface.