A U.S. Navy McDonnell TD2D-1 <i>Katydid</i> target drone in 1947.
U.S. Navy
<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/ah194704.pdf">April 1947</a>, p. 10.