What was made the us so attractive to people from other nationams over the years

The photograph shows children in germany after wwi. the photograph was most likely taken to show?

What was one of the advantages that the united states had over europe regarding the industrial revol the united states had a continuous supply of potential factory worker the united states imported workers from europe to work in factories. the workers in the united states were more skilled than the workers in europe the united states didn't actively participate in the industrial revolution. instead they imported most of their goods from other countries.

Why, once it lost china as its chief ally in asia, did the united states adopt policies to encourage the rapid recovery of japan's industrial economy.?