North Korea has said it is ready to conduct a pre-emptive strike on the US if tensions between Pyongyang and Washington continue to escalate.
The warning was sounded by Choe Ryong-hae, an aide to North Korean leader Kim Jong-un, as the pariah state displayed its submarine-launched ballistic missiles for the first time.
"If the United States wages reckless provocation against us, our revolutionary power will instantly counter with annihilating strike, and we will respond to all-out war with all-out war and to nuclear war with our style of nuclear strike warfare," Choe was quoted by The Telegraph as saying.
Saturday marked the Day of the Sun in North Korea, a blue-riband date for the regime, and it was marked by a huge parade of troops and materiel through Pyongyang, with thousands of soldiers marching past Kim Jong-un through a square dedicated to his grandfather, Kim Il-sung - regarded as the founding father of the modern state.
The arsenal of weapons on display included the new ballistic missile - which is thought to have a range of around 600 miles - and what appeared to be a battery of KN-08 and KN-14 missiles, which analysts believe could reach the US mainland.
Mr Trump has made clear that he intends to curb North Korean belligerence, and over recent days a US naval strike group led by the aircraft carrier USS Carl Vinson has sailed towards the peninsula, a mission roundly condemned by North Korean state media.