What's the Kennection? #199

What 1970s soft-rock band had their biggest AM gold hits with "If," "Baby I'm-a Want You," and "Make It with You"?

What star will the planet Venus next "transit" in December of 2117?

Denver is called the "Mile High City" because it officially sits at 5,280 feet above what?

What movie, the top-grossing film of 2008, introduced the ill-fated political slogan "I Believe in Harvey Dent"?

"Allahpundit" writes for what conservative blog, named for the gas used by the Montgolfier brothers to pioneer human flight?

What's the "Kennection"?