It is one of the most powerful unions in the country. And has long barracked for rights that are at the core of the Australian Labor Party: decent pay and working conditions.But now, an investigation by The Age, The Sydney Morning Herald and 60 Minutes has revealed that underworld figures and bikies have infiltrated the union, and major building projects in Victoria and NSW.

Today, investigative reporter Nick McKenzie on the sudden resignation of controversial CFMEU boss John Setka, in the wake of these allegations. And whether it’s possible to rid the union of corruption, and a culture of standover tactics and bullying.