Bill Nelson has stepped down as NASA administrator, ending a half-century of public service. Nelson and NASA Deputy Administrator Pam Melroy left the agency on Monday (Jan. 20), the day that ...

ON WESH. HE HAS LED NASA INTO A NEW ERA OF EXPLORATION, REVIVING AMERICA’S DREAM TO THE RETURN TO THE MOON AND GO BEYOND. BUT TIME AT THE TOP FOR BILL NELSON IS RUNNING OUT. THE ONE TIME ...