Runners Ladislav Jasko (L) and Jozef Rajchl (R) during a 24 hour run around the roof of the Slovak National Radio Building in Bratislava, Slovakia on 21. May 2010. The Sky Run 2010 organised by the Extremerun running club should become an worldwide recognised annual tradition of 24-hour runs on roofs of famous buildings. It's goal is to promote extreme running. Only five runners appeared on the start of the run.

(L-R) Jozef Rajchl, Ladislav Jasko, Martin Domcek and Roman Pafko immediately after the start of a 24 hour run around the roof of the Slovak National Radio Building in Bratislava, Slovakia on 21 May 2010. The Sky Run 2010 organised by the Extremerun running club should become an worldwide recognised annual tradition of 24-hour runs on roofs of famous buildings. It's goal is to promote extreme running. Only five runners appeared on the start of the run. EPA/Peter Hudec

Runners Ladislav Jasko (L) and Jozef Rajchl (R) during a 24 hour run around the roof of the Slovak National Radio Building in Bratislava, Slovakia on 21 May 2010. The Sky Run 2010 organised by the Extremerun running club should become an worldwide recognised annual tradition of 24-hour runs on roofs of famous buildings. It's goal is to promote extreme running. Only five runners appeared on the start of the run. EPA/Peter Hudec