(Track & Field) Emory University junior Isaac Chambers set a school record in the 500-meter dash during the Orange and Purple Classic on Saturday.  Chambers broke his own program-best mark in the event with a time of 1:07.51, finishing 15^th overall among a field of mostly NCAA Division I competitors.  He also ran the leadoff leg of the Eagles’ 4x400-meter relay team, which finished seventh in a time of 3:35.92.