Spectacular footage: Conquering the Matterhorn We will take you on a breath-taking ascent of the Matterhorn – thanks to exclusive video footage. Daniel Foppa , Lea Blum

Once in a lifetime: A Gopro and a helicopter camera captures impressions of the ascent of the Matterhorn. (Helmet camera: Nadine Schmid, mountain guide: Fabian Lauber, helicopter camera: Sven Epting, production: Lea Blum)

On 17 July 2015, forty mountaineers from Switzerland, Italy, England and France - the countries that competed against each other in the race for the first ascent - climbed all four ridges of the Matterhorn simultaneously. It was an act of commemoration of the first ascent 150 years ago. On the summit they signed a pact of international friendship.