Airing in 1983, the final episode of which sitcom earned a 60.2 Nielsen rating?

Which cosmonaut died in the crash of his MiG fighter on a training flight near Moscow on March 27, 1968? Air Force photos from 1949 show what some believe are the ruins of Noah's Ark on which Turkish mountain? Filling which tanks with air makes a submarine rise to the surface? What airborne nickname was given to 1920s Olympic distance runner Paavo Nurmi? Airline steward Gaetan Dugas, who died in 1984, was famously but wrongly labeled "Patient Zero" of which disease? Which airline invited travelers to "fly the friendly skies"? Planes lined up with the runway just before landing are said to be on what? In 1797, Andre-Jacques Garnerin made the first descent of what kind, dropping from a balloon over Paris?