Misc: In 1938 Graf---------- , world's largest airship, makes maiden flight. ?

Questions

Which country always leads the opening olympic procession?

Which country and western singer is known as the 'okie from muskogee'?

Which country cancelled national beauty contests 1992, claiming they were degrading?

Which country controlled Angola prior to its independence?

Which country has been called "the gift of the nile"?