We were flying home from L.A. to Denver the other night and my husband, a pilot, taught me a new fact: to spot an airport at night you look out for a series of flashing lights. Civil airport beacons flash alternating white and green lights, and military airports flash two white lights followed by one green. I spent a fun hour peering out of the window spotting airports down below. So the next time you’re flying at night, look out!