It's a transition that will be felt around the world, as millions of workers at repair shops, fuel stations, oil fields and farms find their jobs affected by an economic dislocation of historic proportions.
By Ari Natter and Keith Laing An acrid smell hangs in the air at Trenton Forging Co. on the outskirts of Detroit as a 4,500-pound hammer slams a bar of red hot steel with enough force to shake the building. A worker uses tongs to position the piece, heated to 2,200 degrees, under the hammer, then onto a conveyor belt. The process is repeated 7,000 times a day at the