Festival goers at a nationalist, right-wing concert in Germany were taken by surprise when souvenir t-shirts they were given had a secret anti-far right message that emerged only after being washed.

The slogan on the shirts first read "hardcore rebels" along with a skull and nationalist flags. But once washed the slogan turned into a message from a group offering help to right-wing extremists break away from the neo-Nazi scene.

(READ the story in Reuters)