As Trump and Kim prepare to meet again, how much progress has been made since their first encounter?

US President Donald Trump has announced his plans for a second face-to-face meeting with  North Korean leader Kim Jong-un on February 27 and 28 in Vietnam. At their first historic meeting in Singapore, the leaders agreed on multiple terms, including “complete denuclearisation of the Korean peninsula” and transformation of their nations’ bilateral relationship. But eight months later, how much progress has been made on those goals?