Photo courtesy of Smithsonian Air and Space Museum

So this is how we got to spy on Boris and Natasha. For today only, until 5:30 p.m., the Smithsonian Air and Space Museum will be hosting a free, public viewing of the newly declassified HEXAGON (KH-9) satellite in the parking lot of the Steven F. Udvar-Hazy Center. The now hefty, ten-foot in diameter relic of the cold war took pictures of the Soviet Union and other targets from 1971 to the early 1980s during its lifespan.

The unveiling is part of the National Reconnaissance Office’s 50th anniversary.