But, for now, the focus remains on cycling, Operation Puerto, Fuentes and Tyler Hamilton's testimony.

CNN: Dopes on the ropes: Can sport ever beat its drug cheats?

Operation Puerto focused on doping within cycling and uncovered a whole host of cyclists which had been complicit in working with Fuentes.

CNN: Doping doctor punished

The Operation Puerto doping trial focused on cycling.

BBC: Spanish doctor Fuentes convicted over cyclist doping

Pound argues that Operation Puerto shows just how systematic doping had become in cycling.

CNN: October 24, 2012 -- Updated 1231 GMT (2031 HKT)