Today on NZ Herald Focus - In an exclusive interview, Luke Williams talks of the moment he realised that he had slipped from a journalist researching drug abuse into an addict.

Another wave of wild weather is hitting many parts of the country today.

And in a major doping crackdown, 31 athletes in six sports could be barred from competing at the Rio Olympics after they were caught in retesting for drugs from the 2008 Beijing Games.