San Francisco International Airport afternoon about 5minutes super clear conditionsThis is not your traditional UFO report it was a sighting of the Aurora aircraft during the afternoon while at the S.F. airport.It was the weekend of the fleet week festivities and me and a friend where talking about nonsense and when we both heard what sounded like the air being rip open.Then we both looked up and saw what appeared to be an high flying aircraft (approx. 75,000 ft. or higher) We both served in the military I was US Navy intelligence and my friend was a US Marine sniper. Like I said at the beginning of this letter this is not your traditional report. The incident happened during Fleet Week in October 2011.