Eyewitness to History: White House Chief Photographer Pete Souza

CHICAGO (WLS) -- This week, President Barack Obama joined another exclusive club: he became only the fourth president to visit all 50 states. South Dakota was the last stop on his list.

To commemorate the occasion, official White House Chief Photographer Pete Souza posted a memorable photo from each of the states President Obama has visited.

Souza has had a front row seat in the Obama White House since before day one. The former Chicago Tribune and Chicago Sun-Times photographer truly is an Eyewitness to History.

ABC7's Ben Bradley went to Washington in 2012 to profile him - watch the full story above.

Souza's pictures from all 50 states can be found here.