The former Olympic track champion Sebastian Coe wants to see penalties for drug cheats increased from two to four years.
The chairman of last year's Olympic Games organising committee says drug takers have been trashing his sport, track and field, and he believes the move back to more lenient two-year penalties hasn't helped.
Coe was speaking after a recent rash of positive tests from high profile athletes including sprinters Tyson Gay and Asafa Powell, who've both withdrawn from next month's world championships in Moscow.
The double Olympic 1500 metres champion is concerned that people are losing faith in track and field, and he would introduce lifetime bans for drug cheats if he could.
