The Patriot missile training for Ukrainian troops at Fort Sill, Oklahoma, is wrapping up soon, an Army spokesman said Tuesday.

Sixty-five Ukrainian soldiers have been training at Fort Sill since mid-January in an expedited training cycle on using the Patriots -- training that typically can last up to a year.

The Ukrainians will depart the Army post in the coming days for Europe, where they will receive additional training, before heading back to Ukraine "in the coming weeks," Col. Marty O’Donnell of U.S. Army Europe/Africa told ABC News.

"In Europe, the Ukrainians training here will meet up with Ukrainians training in Europe, and with U.S., German, and Dutch equipment donations to validate the systems and ensure interoperability," O'Donnell said.

-ABC News' Luis Martinez

The United States is going to speed up the manufacture and delivery of the 31 Abrams tanks President Joe Biden approved sending to Ukraine, a U.S. official confirmed Tuesday.

Instead of making new tanks from scratch, the Department of Defense will now refurbish the hulls of several older models that will be equipped with more modern equipment, according to the official.

The new delivery target date is fall 2023, the official said; previously the anticipated delivery time was believed to be mid-2024.

National Security Council spokesperson John Kirby hinted at the accelerated timeline on Tuesday.

"We're working on that," Kirby said on MSNBC. "There's some changes that you can make to the process to sort of speed that up."

-ABC News' Luis Martinez and Teresa Mettela

Japanese Prime Minister Fumio Kishida visited Ukraine on Tuesday for the first time since the start of Russia's invasion.

In Kyiv, Kishida laid a wreath at the memorial for fallen Ukrainian soldiers. In Bucha, where Ukrainian officials said more than 400 civilians were killed last year by Russian forces, he laid a wreath outside a church before observing a moment of silence and bowing.

"The world was astonished to see innocent civilians in Bucha killed one year ago," Kishida said. "I really feel great anger for all the atrocious acts."

-ABC News' Ellie Kaufman

Ukrainian forces destroyed Russian Kalibr-NK cruise missiles in a drone strike in Crimea as the weapons were being transported by rail, the Ukrainian Main Intelligence Directorate said on their official Telegram channel Monday.

Sergey Aksyonov, an adviser to the head of the Republic of Crimea, which Russia annexed in 2014, confirmed a drone attack on his official Telegram channel.

Debris from the aerial object damaged a household and a shop and one person was injured from the explosions, Aksyonov said.

-ABC News' Ellie Kaufman

A Moscow court has sentenced one of Russia's best-known opposition leaders, whose family live in the U.S., to 25 years in prison in what is widely seen a show trial.

Vladimir Kara-Murza is the most high-profile opponent of Russian President Vladimir Putin to be jailed since Alexey Navalny.

Kara-Murza's extraordinarily harsh sentence is one of the lengthiest any opposition figure has received under Putin and illustrates how repressive Russia has become during the war in Ukraine, reverting to something much closer to the USSR where no opposition is tolerated.

Kara-Murza was convicted of treason, as well as "discrediting Russia's armed forces," a new law that effectively criminalizes criticizing the war in Ukraine. He was also convicted of belonging to a banned organization. The charges are widely seen as politically motivated.

Kara-Murza is one of Russia's best-known pro-democracy figures and a veteran critic of Putin.

Kara-Murza, who holds both British and Russian citizenship, spent many years living in the United States and his wife and children still live in Virginia. He was close to the late U.S. Sen. John McCain, who championed human rights in the former Soviet Union.

Dozens of journalists and Western diplomats attended the court hearing on Monday, including the U.S. ambassador who read out a statement condemning the sentence.

"We support Mr. Kara-Murza and every Russian citizen to have a voice in the direction of their country. Mr. Kara-Murza and countless other Russians believe in and hope for a Russia where fundamental freedoms will be upheld. And we will continue to share those hopes and work for that outcome," Amb. Lynne Tracy said.

Kara-Murza previously has survived being poisoned not once but twice. In 2015 and then again in 2017, he suffered organ failure after being exposed to an unknown toxin. Independent researchers later linked the poisoning to the same team of FSB poisoners who targeted Navalny.

He chose to return to Russia after the war began, believing it was important to continue to campaign for freedom in his country and has been an outspoken critic of the invasion.

His trial was held entirely behind closed doors, but a letter containing his closing statement to the court has been released to reporters.

"I only blame myself for one thing," Kara-Murza said in the statement. "I failed to convince enough of my compatriots and politicians in democratic countries of the danger that the current Kremlin regime poses for Russia and for the world."

"Criminals are supposed to repent of what they have done. I, on the other hand, am in prison for my political views. I also know that the day will come when the darkness over our country will dissipate.

-ABC News' Patrick Reevell