NEW DELHI: Credit card fraudsters racked up Rs 65 lakh by bleeding a leading private sector bank in a mindboggling operation that left both the bank and cops in a tizzy. There were two gangs working in tandem. And what has send ripples through the bank brass was the enemy within - a senior manager and a certified verification agent - all part of the well-oiled machinery that siphoned off cash. Police busted the entire network late on Wednesday and eight people have been arrested. But the bank...