B-29s over the skies of North Korea.
USAF
circa 1950 <div style="display: none;">date QS:P,+1950-00-00T00:00:00Z/9,P1480,Q5727902</div>
USAF Museum photo <a rel="nofollow" class="external free" href="http://www.nationalmuseum.af.mil/shared/media/photodb/photos/050427-F-1234P-027.jpg">http://www.nationalmuseum.af.mil/shared/media/photodb/photos/050427-F-1234P-027.jpg</a>