Donald Trump said on Monday he would direct the Pentagon to create a space force" as a new branch of the US military to shore up American dominance in space. Trump claimed that the plan will ensure that America, which plans a return to the moon and a mission to Mars, stays ahead of China and Russia in any new space race. But it is likely to raise fears over the militarisation of space. "Very importantly, I'm hereby directing the Department of Defense and Pentagon to immediately begin the process necessary to establish a space force as the sixth branch of the armed forces," the president said at the White House. "We are going to have the air force and we are going to have the space force - separate but equal." The president was speaking at the third meeting of the National Space Council, revived after a quarter of a century. He was joined by Mike Pence, the new Nasa administrator Jim Bridenstine and former astronaut Buzz Aldrin, the second man to walk on the moon. But there was a skeptical reaction from Bill Nelson, the Democratic senator for Florida. He tweeted: "The president told a US general to create a new Space Force as 6th branch of military today, which generals tell me they don't want. During his remarks, Trump ... insisted: "When it comes to defending America, it is not enough to merely have an American presence in space. We must have American dominance in space. So important." Trump has floated the idea of a space force before but met both mockery and high-level resistance.