Greg Myre

Defense Secretary Lloyd Austin says the U.S. will continue flying 'wherever international law allows.' This comes a day after Russia downed a U.S. drone in the Black Sea.

President Biden announces a submarine deal with Britain and Australia to bolster the Western naval presence in the Pacific. The agreement is seen as part of a larger effort to counter a rising China.

Top U.S. intelligence officials briefed lawmakers Wednesday about unresolved mysteries, such as the origins of the COVID-19 pandemic and an ailment known as the Havana Syndrome.

CIA Director William Burns and other top national security officials address the most substantial threats facing the U.S. as they go before the Senate Intelligence Committee.

In 2016, CIA officers at the American Embassy in Cuba began reporting symptoms that included dizziness and headaches. Many think they were subject to an attack. A new U.S. report says otherwise.

The U.S. intelligence community concludes it's "very unlikely" a foreign country is responsible for the so-called Havana Syndrome ailments involving U.S. officials working abroad.

The U.S. Department of Energy says with "low confidence" that COVID-19 might have originated in a lab leak. But the scientific evidence overwhelmingly points to a natural origin for the virus.

Russia's military has performed poorly, and Ukraine has defied expectations. But will these trends hold? Experts look at how the war could take a different path in its second year.

They used to be called Kremlinologists — American experts on the Soviet Union. Now there's a new generation of Putinologists who seek to interpret Russia by analyzing its authoritarian leader.

There's a lot of confusion about how U.S. fighter jets have come to be shooting so many objects out of the sky the past few days. The White House is under pressure to explain.

Over the weekend, the U.S. military shot down a trio of flying objects. One was in Alaska, another in Canada and a third over Michigan.

Given the hullabaloo over the Chinese surveillance balloon, you'd think something like this never happened before. But it has. At least four times in recent years.

Chinese surveillance balloons have flown over the U.S. at least four times in recent years. But the incidents were relatively brief and did not cause a major stir.

U.S. military officials say they are tracking a Chinese high altitude surveillance balloon that's been over the continental U.S. for the past couple of days.

Russia and Ukraine are waging a fierce war in the sky involving missiles, drones and air defense systems. Yet one thing makes this fight distinctive from previous air wars: pilots are extremely rare.

For months, Ukraine has been demanding, and was denied, state-of-the-art Western tanks. The U.S. and Germany — considered to have the best tanks in the world — promised today to send them.

The U.S. and Germany had resisted sending tanks for months. This marks the latest upgrade in heavy weapons for Ukraine and comes amid growing expectations the fighting will soon escalte.

More classified documents have been found in the private home of a one-time White House official. This time the papers were uncovered in the Indiana home of former Vice President Mike Pence.

There's a growing expectation that Ukraine and Russia are headed for an escalation on the battlefield in the near future. This comes as both sides are receiving new supplies of weaponry.

The U.S. and other NATO countries have agreed to send Ukraine more heavy weapons. The move comes amid speculation that Ukraine, Russia, or both, are planning new offensives.