Guerrilla art project turns a Berlin intersection into a canvas. "Dear police, don’t worry it will rain. It’s water-based paint. It will go away.”

To prepare you for another week of frantic wall-to-wall terrorism coverage: How do liquid explosives work? Does this remind you of any other terrorism plot? And, those metal poles in front of government buildings, can they really stop a truck full of bombs? (Answer: yes, apparently they totally can).More..