17th German concrete canoe regatta(1/4)

Participants take part in the 17th German Concrete Canoe Race on the river Neckar in Heilbronn, Germany, 29 June 2019. Every two years, teams of colleges and construction schools compete to prove that concrete can float. The competition is organized by the German cement and concrete industry. More than 1,000 students participate in about 100 teams. (Photo/IC)

Participants take part in the 17th German Concrete Canoe Race on the river Neckar in Heilbronn, Germany, 29 June 2019. Every two years, teams of colleges and construction schools compete to prove that concrete can float. The competition is organized by the German cement and concrete industry. More than 1,000 students participate in about 100 teams. (Photo/IC)

Participants take part in the 17th German Concrete Canoe Race on the river Neckar in Heilbronn, Germany, 29 June 2019. Every two years, teams of colleges and construction schools compete to prove that concrete can float. The competition is organized by the German cement and concrete industry. More than 1,000 students participate in about 100 teams. (Photo/IC)

Participants take part in the 17th German Concrete Canoe Race on the river Neckar in Heilbronn, Germany, 29 June 2019. Every two years, teams of colleges and construction schools compete to prove that concrete can float. The competition is organized by the German cement and concrete industry. More than 1,000 students participate in about 100 teams. (Photo/IC)