An artist's conception showing the U.S. Air Force Boeing X-20 <i>Dyna-Soar</i> space glider after separation from booster.
U.S. Navy
1961
<a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/department_arch.html">U.S. Navy All Hands magazine</a> <a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/archpdf/ah196102.pdf">February 1961</a>, p. 24.