World's Most Formidable Weapon In Flight -- The Valiant in flight at Farnborough today. Believed to be the most formidable weapon of its class in the World, the Armstrong-Vickers' Valiant was seen in flight at Farnborough, Hants, today at ***** rehearsal of the society of British Aircraft constructors' forthcoming display. September 01, 1952. (Photo by Paul Popper).;World's Most Formidable Weapon In Flight -- The Valiant in flight at Farnborough today. Believed to be the most formidable weapon o