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The first practical helicopter built was the Sikorsky VS300, as in pic.
Glenn Curtiss built the first aircraft for the US Navy in 1910.
the turtle was built in 1775
The first one was built in 1882 in Wisconsin
The first Automobile was built in USA. Henry Ford built the first automobile.
after WWII
Mayfly was the first plane used by the US navy. It was built by pioneer aviator Glenn Curtiss in 1908.
Samuel Morse
The first mosque in the US was built after the first world world war in year and was completed in year 1934.
Philladelphia, PA
Peter Cooper.