"Thousands of German students protesting against changes to the country's higher education system, as well as tuition fees of around €1,500 per year, took to the streets on Tuesday. They staged sit-ins and rallies at around 20 locations around the country, including Berlin, Munich and Cologne... In Munich demonstrators built an "educational blockade" out of cardboard boxes, and then, despite the serious nature of their cause, appeared to have a pretty good time smashing it down."
http://www.spiegel.de/international/0,1518,661874,00.html#ref=nlint
