The DA in Gauteng says Construction mafias disguising themselves as 'business forums' are holding Gauteng infrastructure projects worth billions hostage. The party says the so-called 'business forums' are disrupting construction by threatening workers on site, and armed business forum leaders often arrive to demand work. Furthermore, the construction mafia demands subcontracts for a 30% stake in lucrative private and government projects, threatening violence if they don't get their share. To further discuss this Elvis Presslin spoke to Business Against Crime South Africa's, Roelof Viljoen....