[1] He began working for The New York Times in 2002, having previously been the chief photographer for The Associated Press in Washington, in which capacity he won two Pulitzer prizes for team coverage.
[6] Mills won multiple awards at the "2021 Eyes of History Still Contest" of The White House News Photographers Association.
"[6] Of the seven U.S. presidents Mills covered, he considered Barack Obama the most "photogenic" and Trump the most "iconic.
On the 13th of July, 2024, Mills took a world-famous[9][10][11][12][13][14] photograph during the assassination attempt[15] of the 45th President of the USA, Donald J. Trump, capturing one of the bullets whizzing millimetres away from his head.
The New York Times article's expert considered the photo as 'a one in a million shot and nearly impossible to catch even if one knew the bullet was coming'.