Former Army Secretary Louis Caldera, the White House aide who authorized the flyover, resigned under fire Friday as the Obama administration tried to move past the embarrassing incident that sent panicked workers rushing into the streets amid flashbacks of Sept. 11.
The White House released the findings of an internal review that portrayed Caldera as out of the loop in a cycle of missed messages and questionable judgments as plans for the photo shoot proceeded.
But the investigation is hardly the end of the matter.
Defense Secretary Robert Gates has ordered a review at the Pentagon; the Air Force is conducting its own review as well.
In a May 5 letter to Sen. John McCain, R-Ariz., Gates apologized for the incident, saying "we deeply regret the anxiety and alarm that resulted from this mission."
McCain posted the letter on his Web site Friday.
"I am concerned that this highly public and visible mission did not include an appropriate review and approval by senior Air Force and (Defense Department) officials," Gates wrote.
White House press secretary Robert Gibbs said President Barack Obama has ordered a review of how the White House Military Office is set up, and how it reports to the White House and the Air Force.
That review, to be conducted by deputy chief of staff Jim Messina and Gates, will also offer recommendations to Obama designed to ensure that such an incident will not happen again, Gibbs said.
According to the findings released Friday, Caldera said he didn't know the jet
- known as Air Force One when the president is aboard - would fly at 1,000 feet during the April 27 photo session. He also failed to read an e-mail message describing the operation and seemed unaware of the potential for public fear, the findings said.