What's the Kennection? #12

George Clooney, Vera Farmiga, and Anna Kendrick were all Oscar-nominated for their roles in what 2009 recession comedy?

Mayor de Blasio is converting what obsolete New York City fixtures into thousands of free Wi-Fi hotspots?

What Jonathan Lethem bestseller has a lonely title that refers to Dean Street in Brooklyn, where its protagonists grew up?

What chemical element, named for the Greek word for "hidden," is the noble gas that's heavier than argon but lighter than xenon?

The most expensive movie poster of all time, which sold at auction for $690,000, was from what Fritz Lang sci-fi epic of the silent era?

What's the "Kennection"?