Advisers urge military to rely less on drones, more on expertise - Washington Times

The problem with relying on human agents for intel is they LIE, sometimes unintentionally EXAGGERATE what they see and hear, or just say what they think you want to hear.

The drone, on the other hand, has no such problems in reporting what is apparently there as detected by it's sensors.

ALSO, Northrop Grumman does not manufacture human agents - it builds unmanned air vehicles.

See:

http://www.washingtontimes.com/news/2011/may/31/advisers-urge-military-to-rely-less-on-drones-more/