RQ-170 Sentinel
USAF operates RQ-170 stealth drone over Black Sea
Nine flights have been carried out over the Black Sea by USAF-operated Lockheed Martin RQ-170 Sentinel low observable (or stealth) unmanned aerial vehicles, according to a batch of secret US military documents posted online
USAF discloses recent RQ-170 deployment
Rather surprisingly, the USAF's Air Combat Command has officially disclosed its deployment of Lockheed Martin's stealthy RQ-170 Sentinel unmanned air vehicle during the last six months