Drugs and Sport

Its not been a good few days with Gatlin openly acknowledging that his B sample has also failed and waiting upon Floyd Landis' B sample results.
I've not liked the approach taken by US Athletics in the past in not being more open about athletes who have failed tests. In Gatlin's case he has been the one talking to the media, and all relates to a test taken in April. Of course since then he's gone on to equal the world record for 100m.
Meanwhile Professional Cycling continues to be dragged down by doping scandals. In cycling, failed tests are published earlier, and teams now withdraw riders under suspicion straight away.
Will cycling ever be clean again?