North Korea has been a food insecure nation for much of the past 30 years, with the end of Soviet fuel subsidies in 1991 wreaking havoc on its mechanised agriculture. This, compounded with a period of droughts and floods, caused major food shortages in the 1990s, which turned into famines that killed between 240,000 and 600,000 people. North Korean leader Kim Jong-un has expressed concern about the...