Concrete cracks when it is punctured by a screw.

FORBES: The Taming of the Screw

Cracks in concrete ducts around the pool and corroded pipes were just some of the issues discovered, with repairs carried out by specialists.

BBC: Swindon Link Centre pool to reopen after repairs

Fans wearing the Brazilian national team's trademark yellow shirts milled around outside the stadium, where large cracks between concrete pavement blocks were filled with still-wet concrete.

WSJ: Brazil 2, England 2: Brazil's Maracan? Stadium, National Team Need Work