 Complete the following phrase:  In 1999, in securing the treble of Premier League, FA Cup and European Cup, Manchester United won the European Cup on what would have been Sir Matts 90th birthday - the first time they had won the trophy since Sir Matts 1968 triumph. Then, in 2008, Manchester United won the Champions League again, 50 years after the Munich tragedy, and 40 years since his own triumph in Europe in 1968 where Busbys United defeated Benfica. The day after the 100th anniversary of Busbys birth, Manchester United played Barcelona in the 