Microsoft wrapped up a two-year project supported by the Boulder, Colo.-based Bing team that supports images for Maps. The group imaged nearly the entire United States, according to Laura Snider. The imagery excludes Nevada's Area 51 and California's Vandenberg Air Force Base, as required by the federal government. Snider tells us Bing's 30-centimeter resolution allows viewers to search and see anything larger than a foot in width.