Involved 20k vets who marched on Washington for aid, evicted with teargas

What was the main point of truman doctrine ?

After the success of the sputnik launch, the united states feared that they would never be able to launch their own satellite, the ussr had used technology developed by the united states, the soviets had superior nuclear capabilities, that any future us satellites would not be as successful.

What is the constitutional basis for the expressed powers of the federalgovernment?