Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty

Russian President Vladimir Putin on Tuesday opened his state of the union speech in Moscow with familiar touchstones, including ridding the world of Nazism and liberating Ukraine's Donbas region.

He said of his Ukrainian invasion that the "historic events will determine the future of our country ... each of us is bound by a huge responsibility."

And he said he sought an "open dialogue" with the West, but also blamed Western countries and Ukraine's leaders for holding the country's people "hostage."

"The United States and NATO have been rapidly deploying their bases and biolabs at the borders of our country," he said.

He said Russia tried to settle the conflict in the Donbas region by peaceful means, adding that the West's commitment to peace turned out to be "fraud" and a "cruel lie."

Putin said they were open to dialogue with the West and were open to an equal system of security, but "in response we were getting dishonest answers" and specific actions to expand NATO and deploy new anti-missile systems in Europe. He said that "the whole planet is dotted" with U.S. bases.

-ABC News' Joe Simonetti

The Pentagon announced a new presidential drawdown of security aid for Ukraine valued at up to $460 million on Monday.

This package will include four Bradley Infantry Fire Support Team vehicles, HIMARS ammunition, artillery and mortar rounds, air surveillance radars and more.

President Joe Biden hinted at the new supplies in a press conference from Kyiv on Monday, also saying he would be announcing new sanctions "against elites and companies that are trying to evade sanctions and backfill Russia's war machine" later this week.

-ABC News' Matt Seyler

U.S. President Joe Biden said Monday that Russian President Vladimir Putin was "dead wrong" when he started the war in Ukraine on Feb. 24, 2022.

"When Putin launched his invasion nearly one year ago, he thought Ukraine was weak and the West was divided," Biden said in a statement. "He thought he could outlast us. But he was dead wrong."

The White House released the statement from Biden as he made an unannounced visit to the war-torn country, arriving in Kyiv on Monday morning.

"As the world prepares to mark the one-year anniversary of Russia's brutal invasion of Ukraine, I am in Kyiv today to meet with President Zelenskyy and reaffirm our unwavering and unflagging commitment to Ukraine’s democracy, sovereignty, and territorial integrity," Biden said.

"Today, in Kyiv, I am meeting with President Zelenskyy and his team for an extended discussion on our support for Ukraine. I will announce another delivery of critical equipment, including artillery ammunition, anti-armor systems, and air surveillance radars to help protect the Ukrainian people from aerial bombardments," he continued. "And I will share that later this week, we will announce additional sanctions against elites and companies that are trying to evade or backfill Russia's war machine. Over the last year, the United States has built a coalition of nations from the Atlantic to the Pacific to help defend Ukraine with unprecedented military, economic, and humanitarian support -- and that support will endure."

Biden added: "I also look forward to traveling on to Poland to meet President Duda and the leaders of our Eastern Flank Allies, as well as deliver remarks on how the United States will continue to rally the world to support the people of Ukraine and the core values of human rights and dignity in the UN Charter that unite us worldwide."

U.S. President Joe Biden made an unannounced visit to war-torn Ukraine on Monday, arriving in Kyiv as Washington signals its ongoing support ahead of the one-year anniversary of Russia's invasion.

Biden's visit came ahead of a planned meeting with NATO allies in Poland. He is expected to give a speech at the Royal Castle Arcades in Warsaw on Tuesday evening to offer an appraisal of international support during the first year of the war and to address "how we will continue to stand with the people of Ukraine for as long as it takes," White House spokesperson Karine Jean-Pierre said in a statement earlier this month.

Biden also plans to meet in Poland with leaders of the Bucharest Nine, a group of eastern NATO allies formed in 2015 in response to Russia's annexation of Ukraine's Crimean Peninsula.

Ukrainian President Volodymyr Zelenskyy made a dramatic visit to the United States in December, his first known international trip since the Russian invasion began in February 2022. Zelenskyy met with Biden at the White House in Washington, D.C., before addressing members of U.S. Congress on Capitol Hill.