Lip readers tried to decode a secretive conversation between Kim Jong Un and South Korea's president

  • North Korean leader Kim Jong Un and South Korean President Moon Jae-in stepped aside during their historic meeting in April to have a private chat,
  • Lip readers think they know what they said — including snatches of talk about nuclear weapons, the UN and President Trump.
  • It's worth remembering that lip reading isn't an exact science, and the observers had to deal with distant footage at odd angles. 

North Korean leader Kim Jong Un and South Korean President Moon Jae-in stepped aside during their historic meeting in April to have a private chat far from prying eyes — but lip readers think they've decoded parts of their chat.

According to lip readers who spoke to South Korea's Chosun Ilbo, the Korean leaders discussed mostly business as they  — though President Donald Trump's presence still loomed.

Lip reading isn't an exact science, and the observers had to deal with distant footage at odd angles, but they deciphered a few topics of conversation. 

"The North Korea-US summit must yield positive results and I want to take things step by step to eliminate any problems," Kim reportedly said while sitting down. 

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Kim Jong Un and Moon Jae-In meet at DMZ
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Kim Jong Un and Moon Jae-In meet at DMZ
South Korean President Moon Jae-in and North Korean leader Kim Jong Un shake hands at the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters TPX IMAGES OF THE DAY
South Korean President Moon Jae-in and North Korean leader Kim Jong Un attend a welcoming ceremony in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
South Korean President Moon Jae-in and North Korean leader Kim Jong Un meet in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
People watch a TV showing a live broadcast of the inter-Korean summit, at a railway station in Seoul, South Korea, April 27, 2018. REUTERS/Jorge Silva
South Korean President Moon Jae-in and North Korean leader Kim Jong Un attend a welcoming ceremony in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
South Korean President Moon Jae-in and North Korean leader Kim Jong Un meet in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
People watch a TV showing a live broadcast of the inter-Korean summit, at a railway station in Seoul, South Korea, April 27, 2018. REUTERS/Jorge Silva
People wave the Korean unification flag during the inter-Korean summit, near the demilitarized zone separating the two Koreas, in Paju, South Korea, April 27, 2018. REUTERS/Kim Hong-ji
South Korean President Moon Jae-in and North Korean leader Kim Jong Un meet in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
South Korean President Moon Jae-in and North Korean leader Kim Jong Un attend a welcoming ceremony in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
Soldiers keep watch on the Grand Unification Bridge that leads to the Peace House, the venue for the Inter-Korean summit, near the demilitarized zone separating the two Koreas, in Paju, South Korea, April 27, 2018. REUTERS/Kim Hong-ji
People hold the Korean unification flag as they watch a news report on the inter-Korean summit, near the demilitarized zone separating the two Koreas, in Paju, South Korea, April 27, 2018. REUTERS/Kim Hong-ji
People watch a TV showing a live broadcast of the inter-Korean summit, at a railway station in Seoul, South Korea, April 27, 2018. REUTERS/Jorge Silva
South Korean President Moon Jae-in and North Korean leader Kim Jong Un attend a welcoming ceremony in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
People watch a television news screen showing live footage of the inter-Korean summit between South Korea's President Moon Jae-in (on screen L) and North Korea's leader Kim Jong Un (on screen R) at a railway station in Seoul on April 27, 2018. - North Korean leader Kim Jong Un and the South's President Moon Jae-in shook hands on April 27 over the Military Demarcation Line that divides their countries in a gesture laden with symbolism ahead of a historic summit. (Photo by Jung Yeon-je / AFP) (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
Vehicles carrying South Korean president Moon Jae-in approach a military check point on the Unification Bridge, linked to North Korea, near the demilitarized zone (DMZ) in Paju, South Korea, on Friday, April 27, 2018. Kim Jong Un�on Friday became the first North Korean leader to enter South Korea since the peninsula was divided almost seven decades ago as talks begin over dismantling his nuclear weapons program. Photographer: SeongJoon Cho/Bloomberg via Getty Images
Vehicles carrying South Korean president Moon Jae-in pass a military check point on the Unification Bridge, linked to North Korea, near the demilitarized zone (DMZ) in Paju, South Korea, on Friday, April 27, 2018. Kim Jong Un�on Friday became the first North Korean leader to enter South Korea since the peninsula was divided almost seven decades ago as talks begin over dismantling his nuclear weapons program. Photographer: SeongJoon Cho/Bloomberg via Getty Images
South Korean President Moon Jae-in (C) is greeted by his supporters as he leaves for the truce village of Panmunjom, near the presidential Blue House in Seoul on April 27, 2018 ahead of the inter-Korea summit. - North Korea's leader Kim Jong Un and the South's president Moon Jae-in will meet at the Military Demarcation Line that divides the peninsula before their summit on March 27, Seoul said, in an occasion laden with symbolism. (Photo by Jung Yeon-je / various sources / AFP) (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
South Korean President Moon Jae-in (C) is greeted by his supporters as he leaves for the truce village of Panmunjom, near the presidential Blue House in Seoul on April 27, 2018 ahead of the inter-Korea summit. - North Korea's leader Kim Jong Un and the South's president Moon Jae-in will meet at the Military Demarcation Line that divides the peninsula before their summit on March 27, Seoul said, in an occasion laden with symbolism. (Photo by Jung Yeon-je / various sources / AFP) (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
The motorcade carrying South Korean President Moon Jae-in passes through Seoul as he heads to a summit with North Korean leader Kim Jong Un on April 27, 2018. - North Korea's leader Kim Jong Un and the South's president Moon Jae-in will meet at the Military Demarcation Line that divides the peninsula before their summit on March 27, Seoul said, in an occasion laden with symbolism. (Photo by GREG BAKER / AFP) (Photo credit should read GREG BAKER/AFP/Getty Images)
South Korean President Moon Jae-in (C) is greeted by his supporters as he leaves for the truce village of Panmunjom, near the presidential Blue House in Seoul on April 27, 2018 ahead of the inter-Korea summit. - North Korea's leader Kim Jong Un and the South's president Moon Jae-in will meet at the Military Demarcation Line that divides the peninsula before their summit on March 27, Seoul said, in an occasion laden with symbolism. (Photo by Jung Yeon-je / various sources / AFP) (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
South Korean President Moon Jae-in and North Korean leader Kim Jong Un meet in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters
South Korean President Moon Jae-in and North Korean leader Kim Jong Un meet in the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters TPX IMAGES OF THE DAY
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The lip readers say they made out keywords including "nuclear weapons facility," "Trump," "United States" and "United Nations" with Moon mentioning nuclear facilities and Trump, and Kim bringing up the US and UN. 

Kim reportedly also asked something about how to deal with Trump, which Moon responded to with "large hand gestures," according to Chosun.

Moon reportedly asked Kim to keep lines of communication and progress towards reunification on track. 

The talk lasted around half an hour. 

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