The Fete des Vignerons (winegrowers' festival in French) in Vevey, Switzerland is hosted by a brotherhood of winegrowers since 1979, and is on until August 11. (Valentin Flauraud/Keystone via AP)The Fete des Vignerons (winegrowers' festival in French) in Vevey, Switzerland is hosted by a brotherhood of winegrowers since 1979, and is on until August 11. (Valentin Flauraud/Keystone via AP)The Fete des Vignerons (winegrowers' festival in French) in Vevey, Switzerland is hosted by a brotherhood of winegrowers since 1979, and is on until August 11. (Valentin Flauraud/Keystone via AP)The Fete des Vignerons (winegrowers' festival in French) in Vevey, Switzerland is hosted by a brotherhood of winegrowers since 1979, and is on until August 11. (Valentin Flauraud/Keystone via AP)Aerial view of the arena of the Fete des Vignerons with a capacity of 20,000 spectators, hosting a central LED floor of approx. 800 sqm in Vevey, Switzerland. (Valentin Flauraud/Keystone via AP)The Fete des Vignerons (winegrowers' festival in French), hosted in Vevey, Switzerland by a brotherhood of winegrowers since 1979, is on until August 11. (Valentin Flauraud/Keystone via AP)The Fete des Vignerons (winegrowers' festival in French), hosted in Vevey, Switzerland by a brotherhood of winegrowers since 1979, is on until August 11. (Valentin Flauraud/Keystone via AP)People in costumes pose for photos at the Fete des Vignerons parade during the official opening parade in Vevey, Switzerland, which is on until August 11. (Valentin Flauraud/Keystone via AP)