Misc: What is the longest English word that only has one vowel?

Questions

For what is AWACS the acronym?

Which singer rose to fame in the revue Mr Tower of London in 1923 and became known for Wish me luck as you wave me goodbye?

ANIMALS; from which species of goat is mohair obtained?

The names of which cartoon husband and wife pair were used in army slang for pairs of medals which are normally worn together?

In Paris, what are Louis Blanc and Etienne Marcel?