What's the "safest" color on the US Homeland Security Advisory System's color scale?

More Questions:

Facebook was originally developed as a social tool for students at which university?

What New York Yankee was nicknamed "Mr. October"?

Including the end zones, how long is an NFL regulation football field?

Which Scotland Yard detective lead the hunt for Ronnie Biggs in the sixties?

What was the date of the first day of the 21st century?

What are the Chiuhauhan, Nubian, and Alaskan?

Who wrote "The Power of Positive Thinking', first published in 1952?

What is a "dhampir"?

What western US city is dubbed “The Valley of 10,000 Buffets”?

What is the chemical symbol for Helium?

What instrument is used to measure the strength of a magnetic field?

Approximately how many miles are there in a nautical mile?

What fruit did Algerian priest Pierre Clement create in 1902?

Adrenalize, Retro Active, and Pyromania are albums from which British hard rock band?

What year did Mariah Carey release the song "All I Want for Christmas Is You"?