Meteors are his métier. Lindley Johnson retired after decades in the Air Force to take on a new job: NASA’s Planetary Defense Officer. When meteors are headed for Earth, he’s the guy who tracks them. It’s a field that’s gained interest and had its funding doubled in recent years in the U.S., which he estimates is responsible for 95 percent of asteroid tracking across the globe. And if they do find one? There are now multiple deflection projects in the works that could save the planet.