I want to know the answer to the following question:
What activities was the FBI concerned with during the Vietnam war?
All the background I'm provided with is that "Some of the subjects were investigated for alleged ties to the Communist party (Charlie Chaplin and Groucho Marx), or in connection with antiwar activities during the Vietnam War (John Denver, John Lennon, and Jane Fonda).". Is that enough to answer the question?
Answer: yes