The world's first jet engines were already available shortly before the
end of the Second World War, but they had not been developed to a high
enough standard to take part. This changed after 1945 when, on both
sides of the Iron Curtain, one technological development surpassed the
others and records tumbled almost every week. The era of the piston
engine was finally over and jet fighters now dominated the skies. By the
mid-1950s their speed had already reached double that of the speed of
sound; an achievement which a few years earlier, would have sounded to
many like science fiction.