Col. Gregor J. Leist, Western Air Defense Sector commander, passes the port to Canadian Brig. Gen. David Cochrane, 2nd Canadian Air Division commander, during the annual Canadian Mess Dinner marking the 93rd anniversary of the formation of the Royal Canadian Air Force. The manner in which the port is passed is military service specific. In case of the Air Force, the port never touches the table to symbolize flight. The port is used for all of the official toasts during the Mess Dinner. (U.S. Air Force photo by Kimberly D. Burke)