President of the United States, 美國總統

Roddey E. Mims/United Press International/Courtesy of WHNPA

Charles Del Vecchio/Washington Post & Times Herald/Courtesy of WHNPA

Stanley Tretick/United Press International Newspictures/Courtesy of WHNPA

Chick Harrity/AP/Courtesy of WHNPA

Bob Daugherty/AP/Courtesy of WHNPA
Presidential Access: Unguarded Moments, Captured On Film : The Picture Show : NPR
http://www.npr.org/sections/pictureshow/2013/01/19/169701867/presidential-access-unguarded-moments-captured-on-film