Graham Flanagan: This is a McDonald's in Switzerland. It's where you can buy the most expensive Big Mac in the world. Welcome to Zürich, the largest city in Switzerland. I visited the McDonald's ...

Retired prison guard Donald Gorske has chowed through a colossal number of Big Macs in his lifetime, eating an average of 600 a year since 1972. At one point the now 71-year-old from Fond du Lac ...