Brittle Fracture: ENCORE presentation (11:25) Captain TR Buchanan, USN Episode #052 Can a person crack under the pressures that life brings? What are the physics of Brittle Fracture and how does it relate to personal character and integrity? How can you prepare for the stresses of a naval career? Captain TR Buchanan is the 88th Commandant of Midshipmen at the U. S. Naval Academy. A nuclear trained engineer, CAPT Buchanan has commanded the USS ALBANY and was Commodore of Submarine Squadron TWENTY.