Louis Armstrong receiving a trophy from Ella Fitzgerald and Duke Ellington.

A number of the greatest jazz musicians in the world gathered last night 1/8/1971 at the Tropicana Htel in Las Vegas to pay tribute to the "grandaddy" of jazz, Louis "Satchmo" Armstrong. Seventy years old and still going strong, Armstrong received a trophy topped by a silver trumpet mouthpiece from two other all-time greats, Ella Fitzgerald (L) and Duke Ellington (R).