It may prove to be the defining image of Barack Obama's presidency.
Sunday, May 1, 2011. Obama is huddled with his national security team in the White House Situation Room, receiving real-time updates on the mission to kill or capture the most wanted man in the world: Osama bin Laden.
Obama, wearing a white collar shirt and black jacket with no tie, sits in a small chair in a corner of the room, flanked by Vice President Joe Biden and Joint Chiefs of Staff Chairman Adm. Mike Mullen.
The president, so often pictured in a relaxed pose with a smile on his face, has a grave expression. He is steely eyed and hunched forward. He is staring straight ahead at a screen not visible in the photo.