Indigo Delta Kilo ?

Indigo Delta Kilo

Cryptic shoulder-patch of an unknown USA “Black World” military-entertainment outfit. Presented to awestruck Europeans at Transmediale 08 by Trevor Paglen, author of “TORTURE TAXI: On the Trail of the CIA’s Rendition Flights.” Dr. Paglen would appreciate any leads on the meaning of this logo.

http://www.wired.com/beyond_the_beyond/2008/02/indigo-delta-ki/

Or it's RQ-170 ?

Lockheed Martin UAV Skunk Works Challenge Coin

http://www.worthpoint.com/worthopedia/lockheed-martin-uav-skunk-works-challenge-1

IDK
I don't know

Stating the obvious: it's a Devil ray, but it's the name for Defence Research Associates, a small company's, UAV, nothing to do with Lockheed AFAIK.