NASA Administrator Bill Nelson has left the building, and while President Donald Trump’s nominee awaits a confirmation hearing, the head of Kennedy Space Center will keep things afloat. Nelson, who flew to space on board Space Shuttle Columbia while a member of the House of Representatives,

"America is leading humanity back to the Moon, onward to Mars, and into a golden age of space exploration," Nelson wrote,

Bill Nelson has stepped down as NASA administrator, ending a half-century of public service. Janet Petro is now the agency's interim chief.