NEW YORK - WARNING: VIDEO MAY BE TROUBLING TO WATCHThe NYPD released video of a man striking another man with a hammer inside the Union Square subway station.The NYPD arrested the suspect behind a horrifying assault on a man with a hammer inside a subway station in Manhattan.Video released by cops showed the moment Jamar Newton, 41, of Brooklyn, struck a 44-year-old man in the head on the platform at the 14th Street- Union Square station.