Actually, the MiG-25 was created in response to the SR-71 and U-2, to shoot them down. The MiG-25 can do Mach 3, and has missles capable of shooting down the SR. However, the engines have to be replaced after the Mach 3 episode, and no SR's were shot down (that we know of) because they couldnt detect the SR until it was on top of them.
The F-15 in the interceptor style ('A-C' models) was created to kill -25 Foxbats.
PErsonally, I want an A-10 in my driveway. Nothing says "Go away" like an Avenger cannon and Maverick missles.
(Wow, there is alot of thread drift!)