the predicted system accuracy of one to two meters." From a NASA news release: "A high-performance navigation system used primarily for automatic aircraft touchdowns promises centimeter-level landing accuracy.During a four-day period in October 1994, the idea was put to the test on Runway 35 at NASA's Crows Landing Flight Facility in California. Using signals from orbiting GPS satellites and the ground-generated pseudolite signals, 110 autopilot-in-the-loop landings of a United Airlines Boeing 737 were completed." From Honeywell: "A flight management system or FMS is a computerized avionics component found on most commercial and business aircraft to assist pilots in navigation, flight planning, and aircraft control functions. It is considered to be composed of three major components: FMC (Flight Management Computer), AFS (Auto Flight System), and Navigation System including IRS (Inertial Reference System) and GPS." I wonder if this could in the slightest way at all explain how otherwise amateur, but not only amateur, incompetent pilots could perform highly professional flying techniques, such as a high speed descending spiral into a target, or high speed banking turns into relatively narrow buildings? Comment number 95. "What a perfect testing ground for technologies the military has a vested interest in keeping under wraps. And the fact that multiple firefighters in the Oral History accounts talk about three very large explosions just prior to collapse" I thought you guys were saying it was thermite - hence the pools of molten metal? I thought it had to be thermite because that explained the absence of explosions,