I knew there was a reason why I liked Ted Kennedy. From a Wired article:
Ngozi Pole is systems administrator for Sen. Edward Kennedy (D-Massachusetts), whose office runs the only Mac operation on Capitol Hill. Pole administers about 60 Macs and a couple of PCs. “(The Senate) got hit pretty hard by a worm recently,” he said. “When that happened they had to shut a lot of computers down to isolate the problem. Kennedy’s office was functioning normally during that time.… OS X is just not as vulnerable as Windows.” Pole said Kennedy’s office is moving to a new, centralized OS X file server, and he is impressed with all the Unix security tools he will be able to use.