February 1930. Washington, D.C. "Army Airship C-41 lands on Mall and airmen, led by Brigadier General William J. Flood of the 19th Airship Company, place wreath at Lincoln Memorial, honoring Lincoln's Birthday."
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Check out this cool image from 1930. This is a military C-41 blimp floating near the Lincoln Memorial in honor of Abe Lincoln's birthday. Also, you can check out film footage of this at Critical Past.