Neil Armstrong and the X-15 by twm1340 on Flickr. Neil Armstrong is best known as the first man to set foot on the moon. He also had quite a career as a test pilot including pushing this X-15 to 207,500 feet altitude and over 4000 miles per hour.

Neil Armstrong and the X-15 by twm1340 on Flickr.

Neil Armstrong is best known as the first man to set foot on the moon. He also had quite a career as a test pilot including pushing this X-15 to 207,500 feet altitude and over 4000 miles per hour.