If idle hands are the devil's hands, Greece is finding out the hard way: Gunmen this morning stormed Microsoft's Athens headquarters, ramming the building with a gasoline-laden van before setting fire to it. The attack injured no one, but heavily damaged the building's first floor and shut the office for at least the day, in what Reuters notes is the latest in a series of arson hits on banks and foreign companies as anger simmers over high unemployment and austerity measures in the financially strapped nation. No one has claimed responsibility for the Microsoft attack, but the AP notes that anarchist or radical left-wing groups are usually responsible. (More Athens stories.)