August 11, 2010 2:12 pm Park Avenue's Dumpster Pools Ben tests the waters at the free swimming pools upcycled from trash bins. Local 5:34 VIDEO: Columbia University protesters takeover Hamilton Hall 3:01 I-Team: NYPD officers testify in surveillance video controversy 1:59 2 suspects charged with murder in Long Island body parts case 2:35 Extra NYPD patrols in Central Park after series of violent crimes 3:20 Columbia students defy university's 2 p.m. vacate deadline