Pete Seeger, composer of classic American folk tunes including If I Had a Hammer" and "Where Have All the Flowers Gone?", was spied on by FBI agents for more than two decades because he wrote a protest letter as a young man concerned about plans to deport tens of thousands of Japanese American citizens at the end of the second world war. A vast file on Seeger was released ... in response to a request under the freedom of information act. The bureau's spies first took an interest in the singer in 1943, [and continued] into the early 1970s. The suspicion was that Seeger, who died in early 2014, was a security risk with close connections to the Communist party. The FBI file on him has nearly 1,800 pages - 90 of them are still withheld for security reasons. Throughout the 1950s, when Seeger was part of the Weavers folk group, the bureau commissioned hundreds of reports on him. As the Weavers scored chart hits, Seeger was blacklisted for his suspected Communist party links. In 1955 he was called before the House Committee on un-American Activities and asked if he was a communist. "I am not going to answer any questions as to my associations, my philosophical or religious beliefs or my political beliefs or how I voted in any election or any of these private affairs," Seeger replied. Two years later he was cited for contempt of Congress and then, four years later, found guilty and sentenced to a year in prison. Let free on bail, Seeger's conviction was overturned a year later.