Answer:
bauxite, coal, iron ore, copper, tin, gold, silver, uranium, nickel, tungsten, rare earth elements, mineral sands, lead, zinc, diamonds, natural gas, petroleum
Explanation:
Naturalized citizens are mostly more politically involved and tend to participate in things like voting more. Naturalization has a positive effect on voter turnout. Naturalized citizens are often immigrants from areas where their rights are not respected so they move to other places where they are willing to participate in public affairs because the system suits them better.
Obama makes the point that America is powerful because has the potential to constantly reinvent itself. He mentions that America has enough productivity, innovation and capacity to do so. It is also a land which protects the interests of everyone and not narrow interests anymore, and this is path that had to be followed from that moment on.
The notional barrier separating the former Soviet bloc and the West prior to the decline of communism that followed the political events in eastern Europe in 1989.