For a long time, I was the lead Wind Tunnel Test Engineer for classified programs for Northrop Grumman. Early in the design of all flight vehicles, a ton of wind tunnel testing is needed to verify the design. Each of the major tunnels in the country has unique characteristics. It was common knowledge that the KGB would follow different wind tunnel, test people through airports and monitor their destinations. Therefore, it was simple to follow which tunnels were being used, and based on the characteristics of the tunnel, they could learn a lot about the design. We were often followed, and many times pictures were taken. Science Fiction Author Ray Jay Perreault My web page where you can look at my collection of work, and the Award-Winning novel “Virus-72 Hours to Live,” which is the first book of a seven-book series. http://www.rayjayperreault.com