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Severe weather is expected to keep impacting large parts of the U.S. Southeast on Sunday, after tornadoes and thunderstorms barreled across the U.S. on Saturday, killing at least two people.

Among the charges is conspiracy to distribute large quantities of fentanyl, a significant factor in the opioid crisis. Every year, thousands of Americans overdose on the drug.

Here’s how the U.S. could reach net-zero carbon emissions by 2050.

In 1910 the largest fire in U.S. history burned over 3 million acres. Premiering Feb 3.

In 1959, Soviet Premier Nikita Khrushchev toured the U.S. Premieres Nov. 18 on PBS.

In the 1960s, the Ku Klux Klan reemerged in an unlikely place. Premieres January 13, 2015.

Follow the U.S. sled hockey team as the clock counts down to the 2014 Paralympic Games.

Why was the U.S. left scrambling for critical medical equipment in the COVID-19 crisis?

Why did the U.S. go to war in Iraq? What went wrong? And at what cost?

An look at senior citizen volunteers who transform their lives by greeting U.S. troops.