The United States collected $1 billion in punitive tariffs during that period. The United States comprises 50 states. The United States consists of diverse ethnic groups. the United States' contributory social insurance retirement system the United States Department of Transportation The United States economy is not showing any signs of slowing down. The United States fought with Britain and the Soviet Union against the German Nazi threat in Europe. The United States has long been known as a "melting pot" because most of its people are descended from immigrants. The United States has many kinds of climates. The United States has solved its problems with racial discrimination. The United States is abundant in natural resources. The United States is a democracy.