In 1986, a brittle O-ring seal was determined to be the cause of what?

More Questions:

In the X-Men comics, what element is fused with Wolverine's bones?

The Christmas carol "Jingle Bells" was first published in what year?

What is the only nationality mentioned in the song "The Twelve Days of Christmas"?

What island in Manila Bay was the site of a famous 1942 siege?

How many US states begin with the letter "O"?

Which joint type can be found inside the human skull?

On the periodic table, an element’s atomic number represents the number of what in it's atom?

Who played Molly's love interest in the movie "Pretty in Pink"?

What TV family had three sons named Brad, Mark, and Randy?

Who does David Paymer play in the 1995 movie "Get Shorty"?

What Romanian communist president was shot in December 1989?

In 1641, who married Mary Stuart, the daughter of England's King Charles I?

Who was president of the US from 1953 to 1961?

On January 1, 2016, which Canadian province became the first one to allow the testing of self-driving vehicles on public roads?

What were the names of the host and his sidekick on the TV show "Fantasy Island"?