It's SlutWalk in Berlin today. It's become an annual event, last year there were about 3000 people there. This year it starts at Brandenburg Gate at 2pm and goes up to Strausberger Platz on Karl Marx Alle about 5km.
Slutwalkers are fighting for the right to wear what they want on the street without fear of violence. It's the people who commit the violence who are wrong, not the people who wear what they like, who often get the blame.