Feb. 16 (UPI) -- On this date in history: In 1923, archaeologists opened the treasure-laden inner tomb of Tutankhamen, "King Tut," in Egypt's Valley of the Kings. In 1933, a patent for the synthetic fiber nylon was awarded to the DuPont Co. In 1959, Fidel Castro was sworn in as Cuba's leader and set up a Communist regime. UPI File Photo In 1983, roaring summer brush fires fanned by 50 mph winds swept southern Australia, killing dozens of people and destroying at least 100 homes. In 1984, Bill