 It completed its primary mission six years ago, but it's been still operating, getting further data, which is great. But it's been hit with a whole bunch of problems that could end the mission. It's had a failure of electronics, and it also was hit by a micrometeorite that's causing light leaks now. They're hoping to get them fixed, but that's the story, John. Bob Zimmerman, 14 years of Behind the Black. We're going exploring. I'm John Batchelor. Stay tuned for more of CBS Eye on the World with John Batchelor.