Dream and reality came together in a park in Moscow as French artist Olivier Grosse-tete launched one of his famous flying bridges. The 18-meter bridge is surprisingly light. It's made from over three-hundred cardboard boxes and lifted by three giant balloons. The event marked 80 years since the building of the Exhibition of Achievements of the National Economy, a Soviet park north of Moscow. Local volunteers helped to make the flying bridge from scratch in one day.