Greg Myre

Ahead of NATO's summit, Ukraine's president makes the case for security guarantees. He also arranged for commanders released by the Russians to return to Ukraine against the wishes of Russia.

NPR has learned that the Biden administration plans to send cluster munitions to Ukraine. Both Russia and Ukraine are already using the controversial weapons, which pose a long-term risk to civilians.

When Russia launches an airstrike on Kyiv, the first line of defense is parked in a hayfield well outside the city. The protection consists of two soldiers, a Humvee and a Stinger missile.

Ukraine and Russia each say the other is planning to sabotage the Zaporizhzhia nuclear power plant. They've been trading accusations over the past year, but now they say an attack is imminent.

Zelenskyy made the alarming claim in his nightly video address, adding that he believes the Russians may soon damage the Zaporizhzhia nuclear power plant and blame Ukraine.

Ukraine's big offensive against entrenched Russian forces is nearly a month old and is moving slowly. Ukraine says it's too early to reach any conclusions about how it will end.

Ukraine presses on with its offensive in the east while it watches the aftermath of the Russian mutiny a week ago.

A general in Ukraine's armed forces weighs in on the Ukrainian offensive, and how the rebellion by mercenary fighters in Russia may change dynamics on the battlefield.

The pizza restaurant in the city of Kramatorsk took a direct hit on Tuesday night. The place was a popular hangout for local residents, as well as Ukrainian troops, journalists and aid workers.

The private military contractor Wagner Group launched a brief uprising this weekend, raising big questions about the Russian military and the conduct of the "special military operation" in Ukraine.

The leader of the Wagner Group, who launched a rebellion against Russia's military leadership, ultimately called it off. Besides Russia, no country was watching more closely than Ukraine.

Reaction from Ukraine to tensions in Russia over the prominent head of a Russian mercenary group.

Russia's Defense Ministry says Wagner mercenaries are marching on Moscow. Wagner head Yevgeny Prigozhin has been formally charged with "inciting an armed revolt" by Russia's Federal Security Bureau.

We hear a lot about the big-ticket weapons the West is shipping to Ukraine. But Ukraine is also fighting effectively with a weapon it can buy off-the-shelf and is small enough to hold in one hand.

Ukraine's troops have retaken a number of villages from Russian forces. But the increased fighting is also generating heavy casualties on both sides, according to a British military assessment.

Ukraine's long-awaited counteroffensive is underway. Many wonder how successful it will be in pushing back Russian forces, but U.S. defense officials are calling the war a marathon, not a sprint.

Ukraine's President Volodymyr Zelenskyy has finally broken the silence and announced a long-awaited military offensive against Russia is underway.

Despite mounting evidence, Ukrainian leaders had previously declined to say whether the offensive had been launched. The Ukrainian forces are now attacking the Russians in three separate areas.

The Ukrainian city of Kherson was flooded this week after a major dam was destroyed. It is just the latest in a series of blows since Russia's invasion last year.

Russia and Ukraine traded accusations over who was to blame for damage to a key dam on Ukraine's Dnipro River which has flooded homes and forced evacuations in the south of the country.