Some Russians are desperately trying to get out of their own country following President Putin's mobilization of some 300,000 troops to fight in the conflict.

His new nuclear threats over Ukraine raise the risk from a "cornered Putin," experts told ABC News.

Former senior CIA Field Operative Darrell Blocker discusses the referendums in Ukraine and new fallout from Russian President Vladimir Putin's new troop mobilization.

Two U.S. military veterans who disappeared three months ago while fighting Russia with Ukrainian forces have arrived at New York’s John F. Kennedy International Airport

Military-aged men fled Russia in droves to avoid being rounded up for the war.

Secretary of State Blinken accused Russian President Putin of adding "fuel to the fire" by announcing a partial military mobilization.

Alexander Drueke and Andy Huynh, two military veterans from Alabama who were captured while fighting in Ukraine, are now free, their families said.

ABC News' Jon Karl interviews Ukrainian Ambassador to the U.S. Oksana Markarova on "This Week."

Iconic Russian singer Alla Pugacheva, hugely popular since Soviet times, says she wants to be placed on Russia’s foreign agents list in solidarity with her husband who has been designated as one

President Joe Biden met Friday with the families of Brittney Griner and Paul Whelan, two American citizens who remain detained in Russia.

Ukraine is pointing to new evidence of Russian war crimes as hundreds of people have been found buried in the woods.

Poland’s top leaders celebrated the opening of a new canal that they say will mean ships no longer must secure Russia’s permission to sail from the Baltic Sea to Vistula Lagoon ports

The Pentagon's intelligence chief says Russian forces have shown themselves incapable of achieving President Vladimir Putin’s initial objectives in Ukraine, as things stand now

President Joe Biden plans to meet at the White House on Friday with the families of WNBA star Brittney Griner and Michigan corporate security executive Paul Whelan, both of whom remain jailed in Russia

Former Soviet leader Mikhail Gorbachev has been buried in Moscow after a ceremony attended by thousands of mourners but snubbed by Russian President Vladimir Putin

Russian news reports say five people climbing Eurasia’s tallest active volcano have died in an accident and rescuers are trying to extract two other injured climbers

The funeral and burial plans for Mikhail Gorbachev will sum up the crosscurrents of his legacy

Kyiv officials said Ukrainian forces this weekend hit a military airfield in Crimea, as the first seized Russian superyacht headed to auction.

French President Emmanuel Macron on Friday accused the Russian leader of launching a “brutal attack” on Ukraine in an imperialist, revanchist violation of national borders

Moscow said the designation would be a "point of no return," as Congress considered putting Russia on the list of state sponsors of terrorism.

Brittney Griner and Paul Whelan should hopefully be released from Russia as part of a "two-for-two" prisoner swap, former U.S. Ambassador to the U.N. Bill Richardson said

Gio Benitez reports on the future of space exploration on "This Week."

George Stephanopoulos interviews former New Mexico Gov. Bill Richardson on "This Week."

Two key cities in the eastern Donetsk region are under attack.

WNBA star Brittney Griner was sentenced on Thursday after being detained in Russia for over five months.

Trevor Reed, a former Marine who was freed from a Russian prison in a prisoner swap, said he's hopeful a deal could be worked out for two Americans detained there.

Secretary of State Antony Blinken announced that the U.S. had put a “substantial offer” on the table for Russia aimed at bringing home two Americans imprisoned in Russia.

There are rising concerns over the impact of a potential Russian gas cutoff.

For the first time since Russia invaded Ukraine, U.S. Secretary of State Antony Blinken is speaking to his Russian counterpart about a deal to bring Brittney Griner and Paul Whelan home.

Sources say convicted arms dealer Viktor Bout has been offered by the U.S. in a potential prisoner swap for two Americans in Russia: Brittney Griner and Paul Whelan

Antony Blinken said the U.S. "put a substantial proposal on the table weeks ago to facilitate" the release of Brittney Griner and Paul Whelan from Russia

Paul Whelan's twin brother, David Whelan, spoke to ABC News' Robin Roberts during an interview Thursday on "Good Morning America."

Kyiv worries if the deal struck with Moscow over grain exports will still hold after the attack Saturday.

Russian defense officials are insisting the airstrike hit only military targets.

Brittney Griner’s attorney presented new evidence in court on the fourth day of her trial in Russia, where the WNBA star has been detained for nearly five months.

The agreement ensures both sides of the orbiting outpost will run smoothly.

Bill Richardson is headed to Moscow in hopes that he can broker the release of Brittney Griner, who has been detained in Russia since February.

The pictures appear intended to portray Russians as targets of Russophobia.

“BG is our family,” Penny Taylor said in asking President Joe Biden's help.

The case was the first courtroom test of special counsel John Durham.

Michael Sussman, a lawyer with ties to Hillary Clinton’s campaign, was acquitted of charges that he lied to the FBI in relation to the Russian meddling investigation in the 2016 presidential race.

It was the first in-court test of Durham's more than three-year investigation into the Russia probe.

European Union leaders have agreed to embargo most Russian oil imports into the bloc by year-end

The Justice Department special counsel investigating the origins of the Russia probe is facing his first major test in federal court this week.

Russia has held a dress rehearsal for the military parade to commemorate Victory Day on May 9 when the country marks the defeat of Nazi Germany during World War II

A senior Russian military officer says that a new Russian intercontinental ballistic missile is capable of carrying several hypersonic weapons

Japan’s government says it is closely watching military activities by Russia following reports it conducted tests of submarine-launched missiles in the Sea of Japan

Russian forces have executed civilians in Ukraine in apparent war crimes, Amnesty International said Thursday.

ABC News Senior Foreign Correspondent Ian Pannell reports on unrest in Kazakhstan over rising fuel prices and Russia's support of the government.

President Joe Biden engaged in a lengthy high-stakes phone call with Vladimir Putin as tensions between Russia and Ukraine heat up.