A compilation of 17-month-old video clips from a Chilean military air show is stirring up predictable responses from both sides of the UFO debate. This is a very, very unusual case, and I'm hoping that this case will help move forward the recognition that there really is something here that's worthy of further study. ... It has the possibility of being a breakthrough case," said investigative journalist Leslie Kean, the author of the book UFOs: Generals, Pilots and Government Officials Go On the Record. The case goes back to an air show that was staged in November 2010, at Chile's Air Force academy, which is headquartered at the El Bosque Air Force Base in Santiago. Kean said an engineer at the nearby aircraft factory noticed an anomalous spot as he was sifting through video taken from the show. The spot appeared to move quickly from frame to frame, and the engineer thought it looked enough like some sort of craft to notify the Chilean government agency in charge of investigating anomalous aerial phenomena, [CEFAA]. The way Kean tells it, CEFAA investigators ... pieced together six additional views of the spot-shaped phenomena. CEFAA's conclusion was that the spots were caused by an object traveling through the scene at speeds in excess of 4,000 mph - so fast that it went unnoticed by air-show spectators. "Humans inside this object could not survive," Kean and a co-author, former New York Times investigative reporter Ralph Blumenthal, wrote in a Huffington Post report. "And, somehow, it made no sonic boom..."