Participants climb over a wall at the "Tough Mudder" endurance event series in Arnsberg
Participants climb over a wall at the "Tough Mudder" endurance event series in Arnsberg September 6, 2014. Competitors who took part in the endurance event saw themselves having to overcome various military style obstacles. REUTERS/Ina Fassbender (GERMANY - Tags: SOCIETY SPORT TPX IMAGES OF THE DAY)