Mashable reports that "if you look closely enough on Google or Bing Maps, some places are blanked out, hidden from public view. Many of those places disguise secret or sensitive American military facilities."
"The United States military has a foothold in every corner of the world, with military bases on every continent. It's not even clear how many there are out there. The Pentagon says there are around 5,000 in total, and 598 in foreign countries, but those numbers are disputed by the media."
"But how do these facilities look from above? To answer that question, you first need to locate the bases. Which, as it turns out, is relatively easy." "That's what Josh Begley, a data artist, found out when he embarked on a project to map all known U.S. military bases around the world, collect satellite pictures of them using Google Maps and Bing Maps, and display them all online."