Greg Myre

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.

Western countries will send what looks to be the largest tranche of military hardware so far to help Ukraine prepare for an expected offensive against Russian forces in the near future.

The U.S. government creates millions of classified records each year. How does it keep track of them all?

The U.S. government creates millions of classified documents annually. How does it keep track of them — and how does it know when one is missing?

Classified documents from President Joe Biden's term as vice president were discovered at the Penn Biden Center for Diplomacy and Global Engagement last fall, according to Biden's personal attorneys.

The U.S. is sending Ukraine its largest aid package yet, but it does not include everything the eastern European country wanted.

This month marks 100 years since Ukraine joined the Soviet Union. It did so after Ukraine lost in a bid for independence. Ukraine once again finds itself in another life-and-death battle with Moscow.

Ukraine says it shot down 13 Russian drones aimed at the capital and the surrounding region. Two government buildings and several private homes suffered limited damage.