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In this handout photo provided by Sea World, a trainer wears an inflatable safety vest, Monday, April 28, 2014, in Orlando, Fla., whenever she works near the killer whales. This is another safety measure implemented after the 2010 death of a trainer who was dragged into a pool by an orca. The five-pound nylon vests can be inflated like an airplane life jacket and have a tube connecting to a small oxygen tank that fits in a pouch in the back, said Kelly Flaherty Clark, Sea World's curator of animal training. The vests took more than three years to develop with input from trainers, engineers and safety experts. (Photo by AP Photo/Sea World)
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