The building firm that can destroy presidents

South American leaders are in trouble for associating with Odebrecht.
Several South American leaders and plenty of other officials are in big trouble because they've been accused of taking bribes from the Brazilian firm Odebrecht. How did it get so big .. and so troubled? Wyre Davies explains.
Photo: an Odebrecht sign outside the Olympic and Paralympic village in Rio de Janeiro, Brazil
Credit: AFP/Getty Images