Jazz88's Peter Solomon speaks with filmmaker John Scheinfeld about his 2023 documentary "What the Hell Happened to Blood Sweat and Tears?" The film tells the story of the pioneering jazz rock band - one of the most popular bands in the world in the late sixties and early seventies - and the disastrous impact of going on tour beind the Iron Curtain for the US State Department. Scheinfeld describes the film as "a fascinating political thriller that involves the Nixon White House, the State Department, the governments of Yugoslavia, Romania and Poland, and a lot of behind the scenes doings in Washington."