About the Swiss Drum Corps / http://en.wikipedia.org/wiki/Top_Secret_Drum_Corps :
Top Secret Drum Corps is based in Basel, Switzerland. It is a precision drum corps which features 25 drummers and flag twirlers, famous for its six-minute routines which received notoriety at the Edinburgh Tattoo in 2003. With its invitation to Edinburgh, Top Secret became one of the first non-military, non-British Commonwealth acts to perform on the Esplanade at Edinburgh Castle.
Since its success in 2003, Top Secret was invited to return to Edinburgh in 2005 with a new and improved routine. Under the leadership of Erik Julliard, the band is also responsible for the founding of the Basel Tattoo, a show similar to the Edinburgh Tattoo, now held annually in Basel.
