U.S. President Donald Trump embarks on an 11-day trip to Asia during which he will visit Japan, South Korea, China, Vietnam and the Philippines.

It will be the longest tour of Asia by a U.S. President in 25 years.

The trip comes at a time of heightened tensions with North Korea over its nuclear programme and missile tests.

Donald trump is expected to show a united front with South Korea and Japan while pressing china to take a stronger line with Pyongyang.

President Trump flew first to the U.S. State of Hawaii where he took part in a briefing at the US Pacific command.

He will also visit the USS Arizona memorial at pearl harbor – the scene of the 1941 Japanese attack that drew the us into world war two.