THIS is the astonishing picture which could destroy the career of the greatest competitor in Olympic history. In our exclusive photo Michael Phelps, who won a record EIGHT gold medals for swimming at the Beijing games last summer, draws from a bong. The glass pipes are generally used to smoke cannabis. And after sporting chiefs announced laws which mean four-year bans for drug-taking, Phelps’ dreams of adding to his overall 14 gold medal tally at the 2012 games in London could already be OVER. GOLDEN BOY: Phelps at Beijing Those dreams seemed the last thing on his mind when he...