Google Sightseeing - Black Holes

Google Sightseeing - Black Holes

This site talks about sections of Google's satelite images that are mysteriously blacked out or blurred. A commenter to the page points out that Dick Cheney's house (the Vice Presidential mansion) is completely pixelated, yet the White House, the Capital Building, and even the Pentagon are not. What is Dick hiding in his backyard that's more top secret than the Pentagon???