Home U.S. President Donald Trump (R) displays a document signed by North Korean leader Kim Jong-un to bring peace and stability to the Koreas during their historic U.S.-DPRK summit at the Capella Hotel on Sentosa island on June 12, 2018 in Singapore.<br> (Photo by Kevin Lim/The Strait Times/Handout/Getty Images) U.S. President Donald Trump (R) displays a document signed by North Korean leader Kim Jong-un to bring peace and stability to the Koreas during their historic U.S.-DPRK summit at the Capella Hotel on Sentosa island on June 12, 2018 in Singapore.<br> (Photo by Kevin Lim/The Strait Times/Handout/Getty Images)

U.S. President Donald Trump (R) displays a document signed by North Korean leader Kim Jong-un to bring peace and stability to the Koreas during their historic U.S.-DPRK summit at the Capella Hotel on Sentosa island on June 12, 2018 in Singapore.
(Photo by Kevin Lim/The Strait Times/Handout/Getty Images)

North Korean leader Kim Jong-un (L) and U.S. President Donald Trump (R) sign a document to bring peace and stability to the Koreas during their historic U.S.-DPRK summit at the Capella Hotel on Sentosa island on June 12, 2018 in Singapore.<br> (Photo by Kevin Lim/The Strait Times/Handout/Getty Images)
North Korean leader Kim Jong-un (L) with U.S. President Donald Trump (R) during their historic U.S.-DPRK summit at the Capella Hotel on Sentosa island on June 12, 2018 in Singapore. U.S. President Trump and North Korean leader Kim Jong-un held the historic meeting between leaders of both countries on Tuesday morning in Singapore, carrying hopes to end decades of hostility and the threat of North Korea’s nuclear programme.<br>(Photo by Kevin Lim/The Strait Times/Handout/Getty Images)