The Ask An Expert lecture series at the National Mall building is presented every Wednesday at noon. A Museum staff member talks to the public about the history, collection, or personalities related to a specific artifact or exhibition in the Museum.

An x-ray of the EX1-A Apollo Applications Project suit from 1968 shows its “toroidal joint system”—from the word “torus”, meaning a doughnut-shaped object. The system permitted the maximum amount of movement for the astronaut.

X-ray by Roland Cunningham and Mark Avino

How to attend

National Air and Space Museum in Washington, DC

6th St. and Independence Ave SW. Washington, DC 20560