US: War would be 'horrific' but North Korea nuclear attack 'unimaginable'

The US's top military officer has said a military solution to the North Korean missile threat would be "horrific" but allowing Pyongyang to develop the capability to launch a nuclear attack on the United States is "unimaginable".

The chairman of the US Joint Chiefs of Staff, Marine Corps General Joseph Dunford, told reporters in Beijing that President Donald Trump directly has "told us to develop credible viable military options and that's exactly what we're doing".