WASHINGTON :NASA on Friday said it received a one-week deadline extension to submit its plans for mass layoffs to the top U.S. personnel agency given the number of high-priority space missions the agency is grappling with this month. Federal agencies faced a deadline of late in the week to turn in plans for workforce reductions and reorganizations, the latest phase of Elon Musk and the Trump administration's sweeping effort to trim back the federal bureaucracy. "Considering a variety of agency