The White House photographer has taken more than 2 million photos during Obama's presidency - here are the best

As President Obama's second term draws to a close, the work of White House Photographer Pete Souza is quite a bit of attention.

Pete Souza has taken an estimated 2 million photographs during Obama's eight years in office, and released them to the public in real time on Flickr and Instagram.

Souza has captured historic moments, such as the Situation Room meeting where Obama learned the outcome of the mission to kill Osama Bin Laden, his march across the Edmund Pettus Bridge in Selma, and his speech in Newtown, Connecticut after the mass shooting at Sandy Hook elementary school.

"There's a certain daily grind to my job," Souza said in a recent interview with NPR. "But I'd say, once, twice, three, four, 10 times a week, you realize that you are an eyewitness to history. And I always try to keep that forefront in my mind."

Twisted Sifter recently compiled 55 photos taken from Souza's "Year in Photos" galleries, which collect dozens of highlights annually. Souza also regularly posts photos to his Instagram.