It's America's 'Manifest Destiny' to plant a flag on Mars, Trump says
President Trump vowed to send astronauts to Mars during his second inaugural address. "We will pursue our Manifest Destiny into the stars," he said, promising to send astronauts to plant the American flag on Mars. Elon Musk, the SpaceX CEO and Trump ally, was seated behind the president and gave a vigorous thumbs up at the remark.