Two teenage girls have been arrested in a violent subway assault on a 55-year-old man, punching him in the head in an attack that sent the victim to the hospital, police said. According to police, the two teens were on a northbound 4 train departing Utica Avenue in Brooklyn at about 1 p.m. when they encountered a man and became aggressive with him, police said. The nature of the dispute wasn't immediately clear. Police say the teenagers became violent and attacked the 55-year-old man, punching him in the face and head. Video of the incident showed the man eventually punching...