Old enemies unite: Japan dispatches its biggest warship since WWII to protect a US supply ship from Kim Jong-un's missiles
- Izumo, a helicopter carrier, is being sent by Japan to protect a US supply ship
- The American vessel is thought to be supplying the USS Carl Vinson strike group
- Deployment marks the first time Japan has used new powers allowing its military to carry out actions that are not strictly in self-defense
- Comes as North Korea threatened to carry out a sixth nuclear test at 'any time'