FBI to hand over Lennon documents BBC NEWS
The contents were chronicled in his 2000 book Gimme Some Truth: The John Lennon FBI File.
Wiener said the documents revealed efforts by President Richard Nixon to deport Lennon to silence his anti-war activities in 1971 and 1972.
"Lennon was planning a national concert tour through the United States to urge young people to vote," Wiener said.
"Nixon got wind of this and ordered Lennon to be deported so he couldn't do this concert tour."