Brig. Gen. Pedro N. Rivera, U.S. Air Force (ret.)
<p>Original source: <a rel="nofollow" class="external free" href="http://www.af.mil/bios/bio.asp?bioID=6919">http://www.af.mil/bios/bio.asp?bioID=6919</a>
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also found at:  "Historia militar de Puerto Rico"; by Hector Andres Negroni (Author); Page: 258; Publisher: Sociedad Estatal Quinto Centenario (1992); Language: Spanish; <a href="//commons.wikimedia.org/wiki/Special:BookSources/8478441387" title="Special:BookSources/8478441387">ISBN 8478441387</a>; <a href="//commons.wikimedia.org/wiki/Special:BookSources/978-8478441389" title="Special:BookSources/978-8478441389">ISBN 978-8478441389</a>, photo courtesy of the United States Air Force.