Some of the most exciting performances of the 2013 Drum Corps International World Championships took place this past August before corps even arrived at Lucas Oil Stadium in Indianapolis. Recapping the Open Class World Championship Finals on Aug. 6, 2013 in Michigan City, Ind., we've assembled a sampler of performance clips of all 14 corps who kicked off the Championships Week action at Ames Field. Click the "PLAYLIST" button in the YouTube player above to toggle between your favorite Open Class corps clips. Buy these performances in their entirety on DVD from DCIstore.org.