The rest of the economy may have stalled out, but one company has so much money it's reaching way beyond what seemed to be its core mission. Over the years, Google has invested mountains of cash in ways that have puzzled Wall Street. Sales chief Nikesh Arora says, "We try many things and some of them work." So how about driverless cars and a wind farm in the middle of the Atlantic Ocean? Michael Liedtke covers Google for the Associated Press.