The North Korean dictator, Kim Jong Un, and the US president, Donald Trump, shook hands for the first time in Singapore on Tuesday. The two men went on to sign a declaration committing themselves to the denuclearization of the Korean Peninsula. But just how committed are they really? Our guests: Sascha Hach (ICAN), Dahye Yim (Korea Verband), Matthew Karnitschnig (Politico)