This video from England is called Guerilla Orchestra plays Manchester December 10th 2010.
Heather Bird, a Manchester-based classical double bassist, created the “Guerrilla Orchestra” in response to the savage cuts being made in music performance and education: here.
USA: Musicians of the Detroit Symphony Orchestra performed at a sold-out strike support concert Saturday broadcast live via webcast to audiences globally: here.
Striking Detroit Symphony musicians face a management-imposed February 11 deadline. They face concession demands that would destroy the orchestra as a top-ranked ensemble: here.