In 1971, while on tour with the Ornette Coleman Quartet in Portugal (at the time under a fascist dictatorship), Haden decided to dedicate a performance of his "Song for Che" to the anticolonialist revolutionaries in the Portuguese colonies of Mozambique, Angola, and Guinea-Bissau. The following day, he was detained at the Lisbon airport, jailed, and interrogated by the DGS (the Portuguese secret police). He was promptly released the same day after the intervention of the American cultural attaché, though he was later interviewed by the FBI in the United States about his choice of dedication.*
Here is the song, enjoy!
For more information on Charlie Haden and his current activities, visit his web site:
Charlie Haden Official Web Site
An interview with Charlie can be found here:
Charlie Haden Interview on Democracy Now!
*from the Wikipedia article on Charlie Haden.