useless trivia: What Word Means: The South East Asia Treaty Organization?

Questions

The first country to host the summer & the winter olympics in the same year?

The first dog in space was named _________.?

The first international cricket match ever, was held between Canada & _____?

The first modern Olympiad was held where?

The first nuclear chain reaction in 1942 by Enrico Fermi & Arthur Compton was achieved in what U S city?