UnScramble this Word: c m e r a?

Questions

In 1953 First passenger to fly commercially around the world in less than ---------- hours?

In 1963 George ---------- (in England), singer, born. ?

In 1973 John ---------- begins testifying before the Senate Watergate Committee. ?

In 1483 ---------- usurps English throne. ?

In 1819 Abner---------- , credited with inventing American baseball, born. ?