UFO Sighting report reads as follows: I was at work in Knoxville, TN looking through windows at sky facing South when I saw a Silver UFO Disc come zooming by heading from NE to SW almost directly towards Mcgee-Tyson Airport which is class B airspace at est. 350 mph and 3000-3500 ft. A few minutes later saw an air liner descending from S to N on downwind leg of landing pattern for the airport at one third the speed of the UFO. I am ex Navy having served aboard Helicopter Carrier and do have a private pilot's license. mufon cms# 82433