First Atomic Clock, 1948
Historical marker location:
4000 Connecticut Ave Northwest, Forest Hills, District of Columbia
( Marker is at the intersection of Connecticut Avenue Northwest and Upton Street Northwest, on the right when traveling south on Connecticut Avenue Northwest.)
Marker installed: 2017
IEEE Milestone
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The District was the site of the first public monument to George Washington: The Washington Monument, which stands in the center of the National Mall, was built to honor the first U.S. president. It was completed in 1884, more than 50 years after construction began.