From the UNLV University Libraries Photographs of the Development of the Las Vegas Valley, Nevada (PH-00394). Part of the collection documents the entire 19 mile length of the north/south Eastern Avenue / Civic Center Drive alignment. This photograph was captured in the section of Civic Center Drive between Las Vegas Boulevard and Lake Mead Boulevard.
Transcribed from back of photo: "Howard Hughes (in cockpit) warms up the XF-11 for its initial test flight. It is one of the world's fastest long-range photographic planes, July 7, 1946."