Putin says 'there can be no winners in a nuclear war and it should never be unleashed'.

 

U.N. Secretary General Warns of Possibility of Nuclear War amid Russian Invasion.

 

US, Russia, China, the UK and France pledge to avoid nuclear war.

 

Kim Jong Un says there will be 'no more war on this earth' thanks to North Korea's nuclear weapons.

North Korea 'ready for nuclear attack' amid show of force.

Former CIA acting director says Donald Trump would be a "dangerous commander-in-chief" and a risk to national security.