Chest-thumping Mo Farah: 'I'm a clean athlete'

Sir Mo Farah has attacked the media for repeatedly raising drug allegations about his controversial coach Alberto Salazar during his fairytale career.A silver medal in the 5,000m in the World Championships in London on Saturday saw the British legend fall agonisingly short of five golden global doubles in his last major event before retiring from track racing.Later, Sir Mo, thumping his chest and with tears in his eyes, said: "Over the years you guys have done many things to build a person up an