Tony ButtlerTony Buttler joined High Duty Alloys in 1974 as a metallurgist and for nearly 20 years was involved in the testing of aluminum and titanium airframe and engine components. After leaving HDA, he earned his Masters degree in Archives and Library Studie at Loughborough University, and in 1996 began his career as an aviation historian. He has since written 30 books and numerous articles, and has become particularly well known for his work on prototypes and secret projects. Read More Read Less