What does a "caliber" measure?

More Questions:

In Greek mythology, what did Medusa have on her head instead of hair?

What classic novel's subtitle is "And What Alice Found There"?

What children's classic first chapter is titled "The Boy Who Lived"?

What "island', the southern-most tip of Brooklyn, has three miles of famous boardwalk?

The Canadian city of Windsor is linked to what US city by the Ambassador Bridge?

In what year was the Toyota Prius hybrid car first commercially sold?

What do scatologists study?

A young shark is known as a what?

Who played the male starring role in 1967 film "The Graduate"?

Which Seinfeld character takes his shirt off when he visits the toilet?

Stings first solo album was entitled "The Dream of the Blue..." what?

The 1987 movie "Full Metal Jacket" was filmed in which country?

What year was astronaut Neil Armstrong born?

In which country was Dominion Day celebrated until 1982?

What US state is Helena the capital of?