 Once called mercenaries, highly trained killers have offered their deadly services for a price--from ancient Rome to the War on Terror. Today, they ve marched from the back pages of Soldier of Fortune magazine to form vast corporations with the power of the most advanced militaries. The payday for these private soldiers has reached $100-billion annually! Unregulated by governing forces, they wage war for those who can afford it. Find out if they are the future of conflict resolution in our 2-hour special.