"The CAG report, signed off by Vinod Rai, incidentally my IAS batchmate, was tabled in the parliament in November 2010. Its most important conclusion was that the government had incurred a ‘presumptive loss’ of Rs 1.76 trillion by selling spectrum at below market price. This huge number, as much as 3.6 per cent of GDP, was explosive and turned the 2G issue into a full-blown scam."