The Nuts And Bolts Of Flight: The Aeronautical Propulsion Systems Collection

  Talks typically last 10-15 minutes and begin at the nose of the SR-71 in the Boeing Aviation Hangar.     The Ask An Expert lecture series at the Steven F. Udvar-Hazy Center is presented every 2nd and 4th Thursday at 12:30 PM. A Museum staff member talks to the public about the history, collection, or personalities related to a specific artifact or exhibition in the Museum.