President Donald Trump said Monday during his swearing-in speech the U.S. was going to expand under his administration, including going to Mars.

"We will pursue our manifest destiny into the stars, launching American astronauts to plant the Stars and Stripes on the planet Mars," he said during his speech at the U.S. Capitol. 

Neither NASA nor the private space flight company SpaceX owned by Trump political ally Elon Musk has commented on the statement, according to Politico.

Musk has been talking about going to Mars for a while.

"Mass to orbit is the key metric, thereafter mass to Mars surface," Musk wrote on X earlier this month. "The former needs to be in the megaton to orbit per year range to build a self-sustaining colony on Mars."

Trump said: "Ambition is the life blood of a great nation, and right now our nation is more ambitious than any other," "There's no nation like our nation."