1. Two years.
2. They used a slackline slung across the face of the falls.
3. No. They are the first people ever to cross the gorge walking upright.
4. In Slacklining the line is not held rigidly taut.
5. The drop is around a hundred meters.
6. That this is just an extreme hobby for Lukas and Reinhard.
7. He walked on a high wire suspended between the two towers.
8. He was arrested by the police.
9. No. All charges were dismissed in exchange for a performance in Central Park for children.