 The Foundation estimates that between 277 and 435 non-combatants have died since 2004, out of 1,374 to 2,189 total deaths.According to a report of the Islamabad-based Conflict Monitoring Center (CMC), as of 2011 more than 2000 persons have been killed, and most of those deaths were civilians.The CMC termed the CIA drone strikes as an "assassination campaign turning out to be revenge campaign", and showed that 2010 was the deadliest year so far regarding casualties resulting from drone attacks, with 134 strikes inflicting over 900 deaths.