Cadets from the 2011 graduating class of the U.S. Air Force Academy arrive to Falcon Stadium on May 25, 2011 in Colorado Springs, Colorado. A total of 1,021 graduates were to receive their diplomas in front of their families, dignitaries and the public at the annual event. (Photo by John Moore/Getty Images)

Graduating cadets from the U.S. Air Force Academy arrive to Falcon Stadium on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

A cadet bows his head in prayer during the invocation at the U.S. Air Force Academy graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

Cadets from the U.S. Air Force Academy try and grab a bag of popcorn that was thrown as they arrive for their graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

U.S. Air Force Academy cadets arrive for their graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

Newly commissioned 2nd lieutenants celebrate following the 2011 graduation ceremony at the U.S. Air Force Academy on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

Newly commissioned 2nd lieutenants throw their caps in the air as a team of F-16 Air Force Thunderbirds fly over the 2011 graduating class of the U.S. Air Force Academy on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

Cadets take the oath of office during the 2011 graduation ceremony at the U.S. Air Force Academy on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

Cadets embrace after receiving their diplomas at the U.S. Air Force Academy graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

Cadets embrace after receiving their diplomas at the U.S. Air Force Academy graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

A cadet prepares to take the stage to receive his diploma at the U.S. Air Force Academy graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)

A cadet's hat falls off as she embraces a commrade at the U.S. Air Force Academy graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. By tradition, cadets put money in their hats representing the year of their graduation with this year's amount $20.11. A total of 1,021 graduates received their diplomas in front of their families and dignitaries at the Academy's Falcon Stadium. (Photo by John Moore/Getty Images)

A cadet leaves the stage after receiving his diploma at the U.S. Air Force Academy graduation ceremony on May 25, 2011 in Colorado Springs, Colorado. (Photo by John Moore/Getty Images)