Meet at the Museum "Great Seal", in the Boeing Milestones of Flight Hall on the first floor.
About the Ask an Expert lecture series: Every Wednesday at noon in the National Mall Building, a Museum staff member talks to the public about the history, collection, or personalities related to a specific artifact or exhibition in the Museum.
Sputnik, launched by the Union of Soviet Socialist Republics (USSR) on October 4, 1957, marked a simple, yet profound event in history: the placement of the first human-made satellite into Earth orbit.