Pearl necklaceThe sighting for this location and date in your database matchs perfectly with the contrail that is left by the aircraft that is said to have replaced the SR-71. While no photos have been made public, the aircraft has apparently been flying since the early 90's. A photo of the contrail was published in Aviation Week and Space Technology in roughly 1990-1992. It was refered to as the"Pearl Necklace" contrail. The aircraft flys at altitudes high enough that there is no acoustic footprint. Those of us in the industry that are not privy to the details of the propulsion system guess the pearls are the result of a pulse jet type systems.((NUFORC Note: Witness elects to remain semi-anonymous. He indicates he has considerable experience in the aerospace industry. PD))