Greg Myre

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.

In Ukraine, a major dam has been breached, threatening towns and cities in the country's south with floods. Russia and Ukraine are blaming each other for the destruction.

A major dam near a nuclear power plant in southern Ukraine has suddenly collapsed. The risk of flooding would pose a threat to the nuclear plant which is occupied by Russian troops.

The surging water from the Kakhovka dam is likely to cause widespread flooding and poses an additional risk to an already troubled nuclear plant. Russia says Ukraine is to blame.

When Russia's Vladimir Putin invaded Ukraine, he clamped down on the media. In his new book, author Alan Philps sees parallels to Soviet dictator Josef Stalin who confined reporters in World War II.

A decade ago, we were still exploring the technological wonders of cellphones and other electronic devices. Few were thinking about how they could be used to monitor us. Then came Edward Snowden.

For well over a year, Russia has carried out airstrikes across Ukraine. Now Russia finds itself on the receiving end, including drones that hit apartment buildings in Moscow.

Most major military operations are shrouded in secrecy. Ukraine's planned offensive against Russia has been under public debate for months. This has created expectations. Some realistic, some not.

Why is Sudan so prone to civil war? The country has suffered from internal conflict for well over half of its 67 years of independence. Two generals are threatening to unleash another civil war.

Sudan has suffered three internal wars spanning more than 40 years of its 67 years as a nation. Two rival generals are now battling in the capital Khartoum, raising fears of another ruinous conflict.