Every Air Force and Navy feels the need for speed. It's just a fact. When trying to scramble your defending aircraft, time is of the essence and speed is a critical element of that. Aircraft developers have come a very long way since the development of the first jet engine in the mid-20th Century. These days, an airframe that can't cruise at supersonic speeds might as well be a diesel-powered propeller plane.
It was a long and winding road human engineering took to get to the point where fighter aircraft have the radar cross section of bumblebee. Here are the fastest examples currently in service.