During the <a href="https://en.wikipedia.org/wiki/Korean_War" class="extiw" title="en:Korean War">Korean War</a>, Koreans from Hamhung identify the bodies of some 300 political prisoners who were killed by the North Korean Army by being forced into caves which were subsequently sealed off so that they died of suffocation.  October 19, 1950.  Lt. Winslow. (Army)
<p>NARA FILE #:  111-SC-351359
</p>
WAR &amp; CONFLICT BOOK #:  1508
Lt. Winslow
<a rel="nofollow" class="external free" href="http://www.defenseimagery.mil/imageRetrieve.action?guid=2f8c2c2b7d7a58fd9921c747e04f403c4a7c51c7&amp;t=2">http://www.defenseimagery.mil/imageRetrieve.action?guid=2f8c2c2b7d7a58fd9921c747e04f403c4a7c51c7&amp;t=2</a>