Dirk Nowitzki thrust both arms in the air, a sea of blue screaming around him and the Dallas Mavericks finally ahead in these ultra-close NBA Finals. Now it really is "now or never" for LeBron James and the Miami Heat. Nowitzki scored 29 points, driving for the go-ahead dunk with 2:45 remaining, and the Mavericks beat the Heat 112-103 on Thursday night to take a 3-2 lead. Read more: http://sports.espn.go.com/nba/recap?gameId=310609006