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
 

Image Gallery

BC-608-A Contactor Unit Clock

Installed in Allied aircraft as part of the Identification, Friend or Foe (IFF) program during World War II, this system would send a signal for 14 seconds of every minute over the pilot's radio to the ground station. The pilot could not speak while the unit was broadcasting. Designed to fit in a standard gauge slot, it has two switches (contactor in or out and clock stop or run), has one small knob (wind), and has clock face that indicates the time the unit is broadcasting. (U.S. Air Force photo)

PHOTO BY: Unknown
VIRIN: 100420-F-1234S-004.JPG
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This photograph is considered public domain and has been cleared for release. If you would like to republish please give the photographer appropriate credit. Further, any commercial or non-commercial use of this photograph or any other DoD image must be made in compliance with guidance found at https://www.dimoc.mil/resources/limitations, which pertains to intellectual property restrictions (e.g., copyright and trademark, including the use of official emblems, insignia, names and slogans), warnings regarding use of images of identifiable personnel, appearance of endorsement, and related matters.