Helicopter on post office annex roof, Los Angeles, Calif., 1946

7 photographs of an Army Air Force rescue helicopter with mail bags loaded into it, Los Angeles, California, 1946 June 17. The helicopter either takes off or lands on the roof of the United States Post Office annex, and mailbags are shown on a wheeled cart and in the helicopter. In negative no. 5 the Los Angeles City Hall can be seen in the distance.