White House Press Secretary Robert Gibbs released the following statement and photo late this afternoon:

The President has accepted the resignation of Louis Caldera as Director of the White House Military Office. Attached is Mr. Caldera's resignation letter. Also attached is a report sought by the President and conducted by Jim Messina, deputy chief of staff, and a photo.

The President has asked his Deputy Chief of Staff Jim Messina and Defense Secretary Gates or his designee to jointly review the organizational structure of the White House Military Office and the reporting relationship of its components to the White House and the Air Force, and to make recommendations to him to ensure that such an incident never occurs again.

The "resignation" comes after a White House internal report regarding the April 27 "photo shoot" of Air Force One flying over New York found that "structural and organizational ambiguities exist within WHMO that at times affect the organization's ability to operate effectively" -- which ulitmately led to many people within the White House unsure of who was at fault.