This is the North American X-15, a legend, a pioneer, an engineering marvel born to boost the scientific research which helped to put men on the moon — It was a sunny morning in the Rogers Dry Lake on October 7, 1967. Only the sound of wind and dust dared timidly to break the silence. Suddenly, a big “bang” came out of the blue. It was the “sonic-boom” of the North American X-15, soaring high at an incredible…