Lex Anteinternet: Sunday, July 18, 1943. Blimp attack.

Lex Anteinternet: Sunday, July 18, 1943. Alexander appointed governo...: The U.S. airship K-74 depth charged the German U-134, which returned fire with its 20mm deck guns. The K-74 was shot down.  The unsuccessful attack was the only such instance of an airship attacking a submarine during World War Two.

K class airship.

Lex Anteinternet: Thursday December 1, 1941. Lighter than air.

Lex Anteinternet: Thursday December 1, 1941. Lighter than air.: 

Thursday December 1, 1941. Lighter than air.

The US airship C-7 flew from Hampton Roads, Virginia to Washington D.C. filled with helium, rather than explosive hydrogen, making it the first airship to use that gas.

This was a large event given that helium, of which the United States has a large supply, is so much safer in this use than hydrogen.