American heavyweight boxer Muhammad Ali throws bare-handed punches in the ring while in training for his fight against Brian London, London, England, August 1966. (Photo by R. McPhedran/Hulton Archive/Getty Images)
American heavyweight boxer Muhammad Ali throws bare-handed punches in the ring while in training for his fight against Brian London, London, England, August 1966. (Photo by R. McPhedran/Hulton Archive/Getty Images)