Several witnesses talked of incredible speeds demonstrated by these crafts,estimated by radar technicians to be more than 10,000 miles an hour.The fastest known speed of a man made aircraft is 3,000 miles an hour.

• 好几位目击者谈到了他们所看到的空间飞船令人难以置信的飞行速度，一些雷达技术人员估计其时速超过1万英里，而迄今速度最快的人造飞行器时速只有3000英里。