The lokheed Martin SR-71 is the fastest and highest flying manned air breathing vehicle. till date it holds the record speed of mach 3.3 (1910+ kts at FL800) and it has a service ceiling of upto FL850 with a range of over 3000nm. still capable of aerial refuelling. It was in service since 1966 to 1999 and during this period over 1000 ground to air missile has been fired at it. all of it missed. all it had to do is to accelerate and climb beyond the range of missile. it does’nt carry weapons. it was a spy plane with brilliant design to reduce radar cross section. The pilots of this aircraft had to wear an astronaut suit for that high altitude.