A Bell H-13J helicopter of the U.S. Air Force, one of the first helicopters to transport the President of the United States, performs a practice landing on the West Lawn of the White House in June 1957.
USAF
1957-06-14
U.S. Air Force photo <a rel="nofollow" class="external autonumber" href="http://media.defense.gov/2015/Oct/01/2001296442/-1/-1/0/151001-F-DW547-009.JPG">[1]</a> from the <a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/Visit/MuseumExhibits/FactSheets/Display/tabid/509/Article/195802/bell-uh-13j-sioux.aspx">fact sheet</a> on the museum website.