The global financial crisis prompted Congress to press for stronger U.S. financial regulations. But experts debate what level of government involvement will help the economy long term.

New screening measures at U.S. airports are being called overly intrusive by some passengers and civil rights groups. National security experts advise using a system that relies more on intelligence,…

Five years after the U.S.-led invasion, Afghanistan continues to face a number of problems aside from its battle with Taliban fighters and opium farmers.

Nuclear power remains an important source of electricity in the United States, but many are concerned security at nuclear plants is inadequate to thwart terrorist attacks.