Identifying the source of your supplied metals is the main purpose of Conflict Minerals Compliance. A Smelter is the first stop for raw materials once they have been mined or recycled by the provider.
The first airplane to take flight was built by the Wright brothers  in Ohio USA and was transported first to North Carolina and flown  for its first time there.
The  turbojet , was invented in the 1930s, independently by Frank Whittle and later Hans von Ohain. The first turbojet aircraft to fly was the Heinkel He 178 V1 first prototype of the German Air Force, the Luftwaffe, on August 27, 1939 in Rostock (Germany).The first flight of a jet engined aircraft to come to popular attention was the Italian Caproni Campini N.1 motorjet prototype that flew on August 27, 1940.It was the first jet aircraft recognised by the Federation FÃ©dÃ©ration Aeronautique (aÃ©ronautique internationale at the Time The german he 178 program was still). kept secretrank Whittle, an English inventor and RAF officer, developed the concept of the jet engine in 1928, Hans von Ohain in Germany, a decade later developed the concept independently at the end of the 1930s.