What's the Kennection? #34

According to Dutch researchers, what part of the Mona Lisa is 83% happy, 9% disgusted, 6% fearful, and 2% angry?

What product did The New York Times compare to "pouring molasses in the Arctic" when Microsoft debuted it in November 1983?

What was General Anthony McAuliffe's one-word reply when the Germans sent him surrender terms at Bastogne in 1944?

In Silentó's 2015 dance hit "Watch Me," what move does he try before he switches to the "Nae Nae"?

What nickname did banned "Black Sox" pitcher Eddie Cicotte earn for being the first master of baseball's most erratic pitch?

What's the "Kennection"?