The U.S. will temporarily suspend 232 tariffs on Ukrainian steel for one year, Secretary of Commerce Gina Raimondo announced Monday.

Ukraine's steel industry is one of the foundations of the country's economy, employing 1 in 13 Ukrainians, according to the U.S. Department of Commerce. Some of Ukraine's largest steel communities have been among those "hardest hit by Putin's barbarism," the U.S. Department of Commerce said in a press release, and the steel mill in Mariupol has become a "lasting symbol of Ukraine's determination to resist Russia's aggression."

"Steelworkers are among the world's most resilient -- whether they live in Youngstown or Mariupol," Raimondo said.

The pledge to slash tariffs "is a signal to the Ukrainian people that we are committed to helping them thrive in the face of Putin's aggression," she said, "and that their work will create a stronger Ukraine, both today and in the future."

Ukraine is currently losing about $170 million every day due to blocked ports and the country's export potential has fallen by more than half, Ukrainian Prime Minister Denys Shmysal said on Monday.

Ukraine also submitted a several-thousand-page questionnaire, the second part of the answers, that must be completed by countries aspiring to join the European Union, Ukrainian President Volodymyr Zelenskyy said Monday during his nightly address.

"It usually takes months. But we did everything in a few weeks," Zelenskyy said.

The Ukrainian president held talks with EU leaders on Monday and claimed Ukraine could be granted EU candidate status as early as June.

Russia running out of missiles

Russia has used up about half of its existing missiles during its invasion of Ukraine, Ukrainian Deputy Defense Minister Hanna Malyar said Monday. But the Russians still maintain the capacity and a certain supply of components to replenish some of their depleted arsenal, Malyar added.

The U.K. Ministry of Defense also stated in its Monday intelligence update that Russia's stockpile of precision-guided munitions "has likely been heavily depleted." Instead, the Russian military is now using "readily available but ageing munitions that are less reliable, less accurate and more easily intercepted."

Russia will likely struggle to replace the precision weaponry it has already expended, the ministry said.

British Prime Minister Boris Johnson tweeted Monday that he has "never been more certain that Ukraine will win," adding that the United Kingdom will stand "shoulder-to-shoulder with Ukraine for as long as it takes."

Fighting continued on May 9 at the Azovstal Iron and Steel Works plant while "some occupiers were walking along the streets" of the surrounding city of Mariupol parading with flags and Ribbons of Saint George, a traditional Russian military symbol, said Petro Andriushchenko, the Mariupol mayor's advisor. Russian forces on Monday tried to blow up the bridge used to evacuate people from the steel plant, trying to "cut off our defenders from the possibility to exit," Andriushchenko said.

There are still more than 100 civilians trapped inside the Azovstal plant in Mariupol, the Donetsk regional governor, Pavlo Kyrylenko, said in televised remarks on Tuesday.

-ABC News' Edward Szekeres, Yuriy Zaliznyak, Irene Hnatiuk and Uliana Lototska

President Joe Biden signed the Ukraine Democracy Defense Lend-Lease Act of 2022 into law on Monday, giving him authority to lend or lease defense equipment to Ukraine and other Eastern European nations.

It passed the Senate by unanimous consent and the House of Representatives with 417 votes.

A similar lend-lease program was enacted in 1941 to provide pivotal aid to Allied nations in the battle against Nazi Germany.

Ukrainian President Vladimir Zelenskyy tweeted that he's "grateful" to Biden for signing the law, adding, "I am convinced that we will win together again. ... Like 77 years ago."

-ABC News' Alexandra Hutzler

Pentagon spokesman John Kirby is blasting Russian President Vladimir Putin's comments at a Victory Day parade in Moscow.

Victory Day is a national holiday in Russia commemorating the Soviet Union's defeat of the Nazis in World War II. Putin said at the parade Monday about the Ukrainian invasion: "You are fighting for the motherland, for its future, so that no one forgets the lessons of the Second World War."

Kirby said that Putin "talked about this being a justified military operation. It's not."

Kirby said diplomatic options remained on the table and Ukraine posed no military threat.

"He said it was timely, that it needed to happen now. No ... he had plenty of options available to him," Kirby said.

He called Putin's comments that Russia was ridding Ukraine of Nazis "a ridiculous claim."

"What we should have heard was plans for how he's going to end the war, how he's going to move his forces out of Ukraine, and how he's going to finally respect Ukraine as a sovereign state, and a nation that bordered his, a nation that posed absolutely zero threat," Kirby said.

-ABC News' Luis Martinez

Tens of thousands of Russians marched in processions through major cities on Monday for an event called the Immortal Regiment -- meant to commemorate relatives who fought and died in World War II. But the marches were also co-opted by the Kremlin to support the Ukrainian invasion.

Many Russians believe the Kremlin's false narrative that Russia is justified in fighting in Ukraine. Some said Russian forces are now repeating the same feats as their ancestors and vehemently backed Russian President Vladimir Putin.

Two women told ABC News that "Kyiv is Russia" originally, adding, “We are winning and we will win."

At least one person -- a journalist -- was killed in a rocket attack on a residential building in Kyiv on Thursday evening, ABC News has learned.

Kyiv Mayor Vitali Kilitschko said Friday that rescuers had found the body of a victim amid the rubble.

Radio Liberty, a service of the U.S.-funded Radio Free Europe/Radio Liberty, reported that one of its employees, Vira Gyrych, was killed when a Russian missile hit her apartment in the Ukrainian capital on Thursday. Her body was found beneath the wreckage Friday morning, according to the report.

Gyrych had worked as a journalist and producer for Radio Liberty's Kyiv bureau since 2018. Prior to that, she worked for leading Ukrainian television channels, according to Radio Liberty.

"The editorial staff of Radio Liberty expresses its condolences to the family of Vira Gyrych and will remember her as a bright and kind person, a true professional," Radio Liberty said in its report.

Israeli Ambassador to Ukraine Michael Brodsky also confirmed Gyrych's death in a Twitter post, saying she was a former employee of the Israeli embassy in Kyiv.

Thursday's rocket attack came as United Nations Secretary-General Antonio Guterres visited Kyiv. Five Russian missiles flew into the city, according to Ukrainian President Volodymyr Zelenskyy. At least 10 people were injured, including four who were hospitalized, according to the Kyiv City Council.