ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Police divers training in the use of a helicopter winch. This is one of the methods used to recover people from the sea, and the police divers must learn the correct techniques. Photographed in Antibes, France, as part of a training exercise by the French National Centre for Aquatic Police Training (CNING).
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