07-03-2008 06:51'America's Corps' turns 50by Drum Corps InternationalAs of this summer, Drum corps' "Long Blue Line" stretches 50-years long. Dan Potter and Drum Corps World's Mike Ferlazzo have more on the Troopers' golden anniversary in today's Field Pass presented by Zildjian. Download and listen. (MP3, 05:44, 5.3 MB) Subscribe to this podcast through iTunes. RSS feed. Field Pass archive.