U.S. Defense Secretary Lloyd Austin convened the second monthly meeting of the Ukraine Contact Group Monday morning, during which more than 40 nations participated virtually.

"This gathering is virtual, but our efforts together are making a very concrete difference on the battlefield," Austin told the group as he faced two large monitors showing the virtual participants. "We're all here today because of the extraordinary valor and resilience of Ukraine soldiers and citizens."

The group was formed last month to help coordinate international efforts to support Ukraine in its fight against the Russian invaders.

"For three months, Ukraine has been fighting with grit and tactical ingenuity against an entirely unprovoked invasion by its far larger neighbor," Austin said. "And we're here to help Ukraine for the long haul."

Defense leaders from 44 countries and representatives of NATO and the European Union participated in the meeting. Several new nations joined the group since its first meeting, including Austria, Bosnia and Herzegovina, Colombia, Ireland and Kosovo.

Ukrainian officials, including Minister of Defense Oleksii Reznikov, also logged on to the virtual meeting.

"My friends, we've got your back -- all of us," Austin told the Ukrainian representatives. "President Zelenskyy and Ukraine's leaders have made history, and your forces have inspired the free world with their courage and skill."

-ABC News' Matt Seyler

Starbucks announced on Monday its decision to exit the market in Russia.

"We continue to watch the tragic events unfold and, today, we have decided to suspend all business activity in Russia, including shipment of all Starbucks products," Starbuck CEO Kevin Johnson said in a statement. "Our licensed partner has agreed to immediately pause store operations and will provide support to the nearly 2,000 partners in Russia who depend on Starbucks for their livelihood."

The announcement comes after the company suspended all business activity in Russia on March 8. Going forward, Starbucks said it will continue to pay its employees in Russia for six months.

Starbucks is one of multiple major U.S. and international companies that have put operations on hold in Russia because of the invasion of Ukraine. Other companies that have suspended operations there include Pfizer, Apple, FedEx, McDonald's and Amazon.

-ABC News' Christine Theodorou

A Ukrainian court in Kyiv sentenced a 21-year-old Russian soldier to life in prison in the first war crimes trial since Russia’s invasion began in February.

Sgt. Vadim Shishimarin pleaded guilty and confessed in court last week to killing a 62-year-old Ukrainian man a few days into the Russian invasion.

During the trial, the widow of the man Shishimarin killed testified that her husband meant everything to her and said she believes the Russian soldier deserves life in prison.

However, the widow said she would support exchanging Shishimarin for any of the Ukrainian soldiers taken prisoner this month by Russia at the Azovstal steel plant in Mariupol, Ukraine.

"I feel very sorry for him," the widow testified. "But for a crime like that I can't forgive him."

-ABC News' Guy Davies

Ukrainian President Volodymyr Zelenskyy spoke Monday at the World Economic Forum in Davos, Switzerland, calling on the West to recognize as a mistake the refusal to impose preventive sanctions on Russia and take decisive steps in that direction.

"We must not react, but act preventively," Zelenskyy told the forum in a virtual address. "And not only adapt what we have to the new realities, but create new tools. ... Do not wait for fatal shots. Do not wait for Russia to use chemical, biological or, heaven forbid, nuclear weapons. Do not give the aggressor the impression that the world allegedly will not offer sufficient resistance. Protect immediately to the maximum freedom and a normal, useful world order."

Zelenskyy said there are still no such sanctions against the Russian Federation, and listed them:

- Complete embargo on Russian oil.
- Complete blocking of all Russian banks.
- Complete rejection of the Russian IT sector.
- And complete cessation of trade with the aggressor.

Zelenskyy also called for freezing and confiscating Russian assets around the world and sending them to a special fund to pay compensation and restore Ukraine.

"There should be a precedent for punishing the aggressor. ... Russian assets scattered across different jurisdictions should be found, arrested or frozen, and then confiscated and sent to a special fund, from which all victims should receive compensation," Zelenskyy said.

He warned it will not be easy, but added that various aggressors will definitely not be motivated to do what Russia has done and continues to do in Ukraine.

Zelenskyy said he believes the world is at a turning point and that the future of not only Ukraine, but the whole world, depends on the resistance to brutal force.

“This year, the words 'turning point' are not just a rhetorical figure of the speech," Zelenskyy said. "Now is really such a moment when it is decided whether brutal force will dominate the world. If it dominates, then our thoughts are not interesting to it, and we can no longer gather in Davos. For what? Brutal force is looking for nothing but subjugation of those whom it wants to subdue, and it does not debate, but kills immediately, as Russia is doing in Ukraine right now -- at this time when we are talking to you."

-ABC News' Guy Davies

Mariupol has not yet fallen, despite Russia's demands that Ukrainian troops defending the besieged Ukrainian port city surrender, according to Ukrainian Prime Minister Denys Shmyhal.

"There [are] still our military forces, our soldiers, so they will fight until the end," Shmyhal told ABC News' George Stephanopoulos in an exclusive interview Sunday on "This Week."

Mariupol is a strategic city for Moscow because it would allow Russian forces in the south to connect with troops in eastern Ukraine's contested Donbas region. It would also give Moscow a key port.

Although Mariupol remains under the Ukrainian government's control, Shmyhal said the city's residents are suffering.

"They have no water, no food, no heat, no electricity," he said. "They ask all of our partners to support and help stop this humanitarian catastrophe."

-ABC News' Monica Dunn