R. Lee Ermey goes through the history of the blade starting with the ancient bronze swords through the Japanese samurai swords up to the current bayonet used by the military.
http://www.youtube.com/watch?v=B4kWcH4NeZw
http://www.youtube.com/watch?v=a3oSMrysxlk
http://www.youtube.com/watch?v=rdvZ3yPIWBo
http://www.youtube.com/watch?v=bX2OO1IUwps
http://www.youtube.com/watch?v=o0R7gE8OkV0
