New York police are investigating after officers were pelted with snowballs while responding to a massive snowball fight at Washington Square Park in Manhattan, as a winter storm blanketed the Northeast in snow. A video of the fracas shows two uniformed officers pacing a walkway in the park on Monday as snowballs fly at them from all directions, hitting the officers and covering them in snow. The officers, growing visibly frustrated, shoved at least two people to the ground as snowballs...