The title of the link is: "Cold War spy satellites were calibrated with marks in the Arizona desert." And it's technically true. They were calibrated with mar

The title of the link is: "Cold War spy satellites were calibrated with marks in the Arizona desert." And it's technically true. They were calibrated with marks in the Arizona desert. Just not those big crosses. > While a few sites are listed inside Arizona—near Fort Huachuca and Luke Air Force Base—they are comprised of the tri-bar optical test pattern used by the US government since the early 1950s, not 60-foot-wide concrete crosses.