Another article mentioned this:

Don't Be Evil

The most obvious question is: What prompted the acquisition? Did Google buy Keyhole -- and take on all its military contracts and NatSec liabilities -- because it badly needed its 3D mapping technology? Or did Google see the acquisition as a convenient way of getting into the military contracting business? Was there any internal discussion in the company about the benefits and pitfalls of absorbing a startup so closely tied with the CIA and the Pentagon? - source