Misc: What famously happened on 7th December 1941?

Questions

about a third of all americans flush the toilet while they're?

In 1940 Discovery of element 93, ---------- , announced. ?

In 1958 Keenen Ivory ---------- comedian (In Living Color), born. ?

In 1960 Mike---------- , singer (Simply Red-Every Time We Say Goodbye), born. ?

In 1986 Alleged Nazi Kurt ---------- elected pres of Austria. ?