NPR's Jon Hamilton reports on the future of the NASA space program after the Columbia tragedy, and why it will be much harder to replace the space shuttle than it was in 1986 after the Challenger disaster.
Tesla laid off hundreds of people. The company's supercharger network has been a striking success. So why did Elon Musk hit that team with devastating layoffs?
Testimony continued in Donald Trump's criminal trial in New York. His lawyers tried to discredit a witness who represented the two women at the center of the allegations against the former president.
It's taken months of debate on the Hill, but Ukraine finally has the military assistance it's been seeking. After two years of fighting, military experts say the nation still faces a long road ahead.