Article Photos: Celts top Knicks 97-90 in OT, avoid playoff sweep 5/6

Boston Celtics forward Paul Pierce (34) drives between New York Knicks point guard Raymond Felton (2) and center Tyson Chandler (6) on his way to scoring a basket during the first half in Game 4 of a first-round NBA basketball playoff series in Boston, Sunday, April 28, 2013. (AP Photo/Elise Amendola)