The masterminds of the largest bid-rigging scheme in federal contracting history are behind bars now. According to the FBI, a network of corrupt public officials and federal contractors in the Washington, D.C. area bled off more than $30 million in taxpayer funding over five years, and they had a billion dollar contract in sight, too. But authorities say they stopped the scheme before that vehicle could be awarded. The man the FBI calls the ringleader, Army Corps of Engineers Program Manager Kerry Khan, was sentenced to nearly 20 years in prison this summer. Rob Burton, former deputy administrator at the Office of Federal Procurement Policy, is now a partner at the Venable law firm. He describes the case and what, if anything, we can learn from it.