Three young people--ranging between 16 and 20 years of age--were pulled to safety by FDNY rescuers off a jetty at Coney Island. Four firemen waded and swam out to the end of the jetty, where two women and one man were trapped by a rising tide. The incoming tide and pounding surf knocked one of the people, a young woman, off of the jetty, where she was badly bruised and cut--one FDNY official said she......