The South Korean, US and Japanese navies have begun their first anti-submarine drills in six months today. This is to boost their coordination against increasing North Korean missile threats and aggression. This two-day drills come as North Korea’s recent unveiling of a type of battlefield nuclear warhead prompted worries that the country may conduct its first nuclear test since 2017. br br #antisubmarinedrills#Northkorea#USnavydrillbr ~PR.153~ED.103~PR.152~GR.125~HT.