By A Mystery Man Writer
When Ali was drafted for Vietnam, many questioned whether he would accept the induction.
Muhammad Ali vs. the United States of America
Muhammad Ali: Biography, Heavyweight Boxer, Activist
Muhammad Ali's letter to US Army seeking exemption from Vietnam war goes to auction
Muhammad Ali Dies at 74: Titan of Boxing and the 20th Century - The New York Times
From The Archive, 29 April 1967: Muhammad Ali Refuses To, 60% OFF
New Muhammad Ali Docuseries Chronicles the Life of 'The Greatest' Athlete and Activist
Muhammad Ali, boxing legend and global icon, dead at 74 – New York Daily News
Muhammad Ali : Muhammad Ali Refuses the Vietnam War Draft
Remember When: Muhammad Ali Protested Against the Vietnam War