Tom Bowman

President Biden is ordering the intelligence community to further secure sensitive information after a major breach, allegedly by a Massachusetts Air National Guardsman.

A mortar blast killed two Marines in Iraq almost 20 years ago. But families weren't told for years it was "friendly fire," a tragic accident, despite regulations. Some of the wounded were never told.

NPR podcast Taking Cover delves into the worst Marine-on-Marine friendly fire incident in modern history.

After a self-detonating drone killed an American contractor and wounded five soldiers, U.S. forces launched a retaliatory strike in Syria against a facility being used by Iranian-backed militias.

As Russia's war with Ukraine reaches the one-year mark, many say the war is entering a critical phase. But some Republican lawmakers are raising questions about the ongoing support from the U.S.

Russia throws new conscripts into battle — beginning a winter offensive in Ukraine. Ukrainians plan their own offensive soon. Can either side avoid a stalemate?

Having announced one of its biggest aid packages yet, U.S. military officials met with allied nations to talk military support for Ukraine. German support for the war remains an unresolved question.

The transfer of the sophisticated missile system comes amid a Russian barrage on Ukraine's energy infrastructure. The announcement came as President Volodymyr Zelenskyy visited Washington.

Volodymyr Zelenskyy is visiting Washington to meet with President Biden and Congress on Wednesday. The trip comes as lawmakers are debating billions more in aid for Ukraine.

Russia is hammering Ukraine with missile attacks, many aimed at electricity stations. Ukraine is shooting down many of these attacks but says it needs more help from the U.S. and NATO.

Russia says all its forces are gone from the key southern city of Kherson. Yet the Biden administration is publicly asking Ukraine to show a willingness to negotiate.

The U.S. expects to be providing weaponry to Ukraine for months and even years to come. Defense officials are confident they can meet the demand, but there are real-world challenges.

Former Defense Secretary Ash Carter died Monday at age 68. He was known for opening ground combat jobs to women and pushing the Pentagon to spend more money on technology.

Kyiv was targeted by Russian forces again Monday, this time by kamikaze drones. The attacks were unsettling and deadly, but what's less clear is whether or not they changed anything about the war.

Russia says it is claiming parts of Ukraine, but facts on the ground say otherwise. Ukrainian troops continue a counteroffensive in the country's south and east that is upending the Kremlin's plans.

Nearly seven months of war in Ukraine, Kyiv's counteroffensive succeeded and Russia ordered more troops to mobilize. Ukrainian lawmakers have been visiting Washington to petition for more arms.

The Ukrainian military says it has begun a counteroffensive in the country's south to take back key territory occupied by the Russians early in the war.

The Pentagon is ramping up its support of Ukraine in its war against Russia. The Defense Department is sending another $3 billion to Ukraine. That brings total U.S. aid to more than $13 billion.

China's ambassador to Washington says the U.S. is provoking China on the Taiwan question with congressional visits. The U.S. military says it's worried about Chinese military exercises around Taiwan.

President Biden said in a guest essay in The New York Times that he's decided to provide Ukraine with more advanced rockets that will enable it to more precisely strike targets on the battlefield.