Private protection industry perhaps?
Investment in, that is! Consider:
A single Blackwater security contractor costs the government $1,222 every day to guard U.S. civilian personnel, or $445,000 per year. That's six times the cost of getting a U.S. Army soldier to perform the same function.
Amount billed per day for a Blackwater senior manager: $1,075
Amount paid per day to U.S. Gen. David Petraeus: $493