Trump says NATO not obsolete

US President Donald Trump says the North Atlantic Treaty Organisation (NATO) is not obsolete, as he had declared on the 2016 campaign trail, but says its members need to pay their fair share for the European security umbrella.

At a news conference with NATO Secretary General Jens Stoltenberg on Wednesday, Trump thanked NATO members for their support of his decision last Thursday to launch 59 cruise missiles at a Syrian airfield in retaliation for a chemical weapons attack on civilians and said it was time to end Syria's civil war.

"I said it was obsolete. It's no longer obsolete," Trump said, adding that the Transatlantic alliance was adapting to the broader mission against Islamic militants that he had urged.

Stoltenberg said he had an excellent and productive meeting in the Oval Office with Trump.