In support of an official event 

The Museum will be closed Sunday, May 25
In addition, the Presidential Gallery will be closed Saturday, May 24

Normal hours will resume on Monday, May 26
 

High Altitude Research

In continuing its program for investigating flight at high altitudes, the Air Corps ordered from Lockheed a twin-engine airplane designated the XC-35. This was the world's first airplane specifically constructed with a pressure cabin. For its achievements with the XC-35 in high-altitude research, the Air Corps was awarded the Collier Trophy for 1937.

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