We mark the death on July 6, 1971 – 49 years ago today – of the jazz trumpet-player, singer, bandleader, and American icon Louis Armstrong. (For our information, Armstrong pronounced his first name as “Lewis”, as shall we.) Known alternately as Louis (as in LOO-wee), “Satchmo”, “Satch”, or simply “Pops”, Armstrong was the “indispensable” man of jazz.