NPR's Mary Louise Kelly speaks with Ukraine's Ambassador to the United States as Russia's war with Ukraine stretches into a fifth year.

Host Mary Louise Kelly talks with National Security Correspondent Greg Myre and Pentagon Correspondent Tom Bowman about Trump's aims in nuclear negotiations with Iran and the risks of military action.

The war in Ukraine enters its fifth year this week, with millions of Ukrainians displaced, hundreds of thousands of soldiers killed, and little change on the battlefield.

NPR's Mary Louise Kelly speaks with Norah O'Donnell about her new book, "We the Women," which chronicles the stories of the women who built America.

Indirect talks between the U.S. and Iran have wrapped, and a deal was not reached on Tehran's nuclear program. NPR's weekly national security podcast Sources & Methods explores what's next.

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