(Pete Souza/Official White House Photo)

The White House has released a photo of President Obama in the Oval Office on the day of the mass shooting at a Newtown, Conn., school.

In the Dec. 14 photo, which was released along with other pictures via the White House flickr feed, counterterrorism adviser John Brennan is seen briefing the president on the details of the attack. 

Obama, who teared up as he delivered a statement about the shooting from the White House that same day, said in a recent interview with NBC News that it was the "worst day" of his presidency.