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 plaque reads: THE ORIGINAL WRIGHT BROTHERS AEROPLANE: The world's first power-driven, heavier-than-air machine in which man made free, controlled and sustained flight, invented and built by Wilbur and Orville Wright flown by them at Kitty Hawk, North Carolina December 17, 1903.