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Kim Jong Un becomes first North Korean leader to visit South Korea

Kim Jong Un becomes first North Korean leader to visit South Korea
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North Korean leader Kim Jong Un crossed over the border into South Korea on Friday, becoming the first North Korean leader to step foot on South Korean-controlled territory.

Kim and South Korean President Moon Jae-in shook hands while standing on both sides of the military demarcation line before Moon joined Kim on the northern side of the border.

The two leaders then crossed over to the South for the summit, where they are expected to discuss the denuclearization of the Korean peninsula. 

The two leaders are also set to discuss a peace treaty to formally end the Korean War of the 1950s.

The summit comes as the U.S. and North Korea prepare for a potential meeting between Kim and President TrumpDonald John TrumpFive takeaways from Cruz, O'Rourke's debate showdown Arpaio files libel suit against New York Times IMF's Christine Lagarde delays trip to Middle East MORE

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Following the largely symbolic move at the border on Friday local time, the U.S. voiced optimism that progress could be made on Pyongyang giving up its nuclear weapons.

"On the occasion of Republic of Korea President Moon Jae-in’s historic meeting with North Korean leader Kim Jong Un, we wish the Korean people well. We are hopeful that talks will achieve progress toward a future of peace and prosperity for the entire Korean Peninsula," White House press secretary Sarah Huckabee Sanders said.

"The United States appreciates the close coordination with our ally, the Republic of Korea, and looks forward to continuing robust discussions in preparation for the planned meeting between President Donald J. Trump and Kim Jong Un in the coming weeks."

Relations between the U.S. and North Korea appear to have improved as the Trump administration pushes for the North to give up its nuclear ambitions.

The White House on Thursday released pictures of newly minted Secretary of State Mike PompeoMichael (Mike) Richard PompeoIMF's Christine Lagarde delays trip to Middle East Saudi mystery drives wedge between Trump, GOP Overnight Defense: Trump worries Saudi Arabia treated as 'guilty until proven innocent' | McConnell opens door to sanctions | Joint Chiefs chair to meet Saudi counterpart | Mattis says Trump backs him '100 percent' MORE's secret meeting with Kim over the Easter weekend earlier this month.

Trump, who once frequently referred to Kim as "little rocket man," called him "honorable" earlier this week. 

The inter-Korean summit this week follows a year of tension between Pyongyang and the international community. 

North Korea conducted a slew of intercontinental ballistic missile tests last year despite strong condemnation and sanctions from the international community.