With the greatest single-season turnaround in NBA history, the Celtics went from the second-worst record last year to the best record this year. May charts the pivotal moments: from losing out on the Number 1 and Number 2 pick in last year's draft lottery to swinging trades for future Hall of Famers Kevin Garnett and Ray Allen; from winning Game 4 of the Finals with one of the greatest come-from-behind victories in NBA Finals history to capping off their remarkable season with another championship banner.