One artist is using a modified form of graffiti to protest the NSA. Early this morning in Berlin, self-proclaimed guerrilla marketing expert Oliver Bienkowski used a powerful projector mounted in a cargo van to light up the side of the US Embassy. The projection emblazoned the Embassy with silly illustration of President Obama and a warning for all to see: NSA in da House. The US Embassy in Berlin is in a heavily-policed area near the Reichstag and the Brandenburg Gate, and officers peacefully shut down the projection within minutes, according to a video posted online of the exchange.