On four occasions in its long history, Time Magazine has placed a red "X" over the picture of a person on their cover, those publication dates being: 7 May 1945, 21 April 2003, 13 June 2006, and 20 May 2011. One of these covers did not deal with the death of the subject. Identify any three of the four subjects who were "X'd" out.
Adolph Hitler, Saddam Hussein, Abu Musab al-Zarqawi and Osama bin Laden