My flights to 217,000 feet and 314,750 feet [96 km were very dramatic in revealing the Earth's curvature ... at my highest altitude I could turn my head through a 180-degree arc and wow!—the Earth is really round. At my peak altitude I was roughly over the Arizona/California border in the area of Las Vegas, and this was how I described it: Looking to my left I felt I could spit into the Gulf of California; looking to my right I felt I could toss a dime into San Francisco Bay.