It is almost like we want something terrible to happen to us. We certainly deserve it.
In his day job, Dr. David Morrison is the senior scientist at NASA's Astrobiology Institute in the Ames Research Center in California. There he specializes in asteroid impact, terrestrial defense from same, planetary exploration and the search for extraterrestrial life. The asteroid 2410 Morrison was named in his honor because "his research into the infrared radiometric properties of asteroids has been fundamental in revealing the diversity of asteroid surface albedos and compositions."
In an extracurricular capacity, though, he's the closest thing that NASA has to an expert on the apocalypse.