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Secretary of State Mike Pompeo. Photo: Deng Min/China News Service/VCG via Getty Images

Following the announcement that North Korean leader Kim Jong-un agreed to "permanently dismantle" his main nuclear complex, Secretary of State Mike Pompeo said the U.S. "is prepared to engage immediately in negotiations to transform U.S.-DPRK relations," and has invited North Korean Foreign Minister Ri Yong-ho to meet him in New York City next week.

Why it matters: This comes after President Trump had directed Pompeo to cancel his August trip to North Korea, saying the country was not "making sufficient progress with respect to denuclearization." But yesterday, Kim promised South Korean President Moon Jae-in that he would close his country's main nuclear site, adding that he'd only do so if the U.S. takes "corresponding measures." Pompeo's response shows that the Trump administration is willing to resume working with North Korea toward denuclearization.

Go deeper

Scoop: Leaked Ukraine memo reveals scope of Russia's aggression

Russian President Vladimir Putin visits a military exposition in Sevastopol, Crimea, in Jan. 2020. Photo: Mikhail Svetlov/Getty Images

Russia has been holding last-minute military exercises near commercial shipping lanes in the Black Sea that threaten to strangle Ukraine's economy, according to an internal document from Ukraine's ministry of defense reviewed by Axios.

Why it matters: With the eyes of the world on the massive buildup of troops in eastern Ukraine, the leaked memo shows Russian forces escalating their presence on all sides of the Ukrainian border.

Read: Former Vice President Walter Mondale's last message

Photo courtesy of Mondale.

Former Vice President Walter Mondale wrote a farewell letter to his staff, sent upon his death on Monday, thanking them for years working together.

Dear Team,

Well my time has come. I am eager to rejoin Joan and Eleanor. Before I Go I wanted to let you know how much you mean to me. Never has a public servant had a better group of people working at their side!

Together we have accomplished so much and I know you will keep up the good fight.

Joe in the White House certainly helps.

I always knew it would be okay if I arrived some place and was greeted by one of you!

My best to all of you!

Fritz

Former Vice President Walter Mondale dies at 93

Walter Mondale, left, with former President Jimmy Carter in Jan. 2018 at the McNamara Alumni Center on the University of Minnesota's campus in Minneapolis. Photo: Anthony Souffle/Star Tribune via Getty Images

Walter Mondale, who transformed the role of U.S. vice president while serving under Jimmy Carter and was the Democratic nominee for president in 1984, died Monday at 93, according to a family spokesperson.

The big picture: President Biden, who was mentored by Mondale through the years, said in 2015 that the former vice president gave him a "roadmap" to successfully take on the job.