Question: The 42d Attack Squadron of the United States Air Force flies General Atomics MQ-9 Reaper, sometimes called Predator B, is an unmanned aerial vehicle (UAV) capable of remotely controlled or autonomous flight operations, developed by General Atomics Aeronautical Systems (GA-ASI), primarily for which organization?
Context: General Atomics Aeronautical Systems, Inc. (GA-ASI), an affiliate of General Atomics, provides unmanned aerial vehicles and radar solutions for the U.S. military and commercial applications worldwide. The 33d Special Operations Squadron is a United States Air Force unit, assigned to the 27th Special Operations Group, Cannon Air Force Base, New Mexico.  The squadron operates the General Atomics MQ-9 Reaper. The General Atomics ALTUS is an unmanned aerial vehicle, designed for scientific research, built by General Atomics Aeronautical Systems (GA-ASI). The Radd 85 (Thunder 85) remotely piloted drone was designed by the Research and Self-sufficiency Jihad Organization for the Iranian Army Ground Force.  It is an unmanned "suicide drone" that is remotely guided to its target by a human operator.  Upon reaching its target, it commits a dive and strikes the vehicle, setting off its warhead.  It is described by the army as a "mobile bomb-like drone."  This sets it apart from other remotely guided weapon systems such as the General Atomics MQ-9 Reaper deployed by U.S. armed forces, which carry weapons such as the Hellfire missile which is expended and the UAV returns to its base of operations.  Intended targets include tanks, APCs, surface ships and low-flying helicopters. Iran is self-sufficient in manufacturing the weapon system.  It is designed to be operated in an electronic warfare environment.  It is capable of carrying a variety of warheads to fit the mission profile. The 42d Attack Squadron of the United States Air Force flies General Atomics MQ-9 Reaper Unmanned aerial vehicles and is currently stationed at Creech Air Force Base near Indian Springs, Nevada.  The 42d oversees the training and combat deployment of aerial vehicle and sensor operators assigned to the Reaper.  All aircraft will employ the AN/AAS-52 Multi-Spectral Targeting System developed by Raytheon. The General Atomics MQ-1C Gray Eagle (previously the Warrior; also called Sky Warrior and ERMP or Extended-Range Multi-Purpose) is a medium-altitude, long-endurance (MALE) unmanned aircraft system (UAS).  It was developed by General Atomics Aeronautical Systems (GA-ASI) for the United States Army as an upgrade of the General Atomics MQ-1 Predator. The General Atomics Avenger (formerly Predator C) is a developmental unmanned combat air vehicle built by General Atomics Aeronautical Systems for the U.S. military.  Its first flight occurred on 4 April 2009.  Unlike the previous MQ-1 Predator and MQ-9 Reaper (Predator B) drones, the Avenger is powered by a turbofan engine, and its design includes stealth features such as internal weapons storage, and an S-shaped exhaust for reduced infrared and radar signatures. The 29th Attack Squadron is an active United States Air Force training unit flying the General Atomics MQ-9 Reaper.  It is assigned to the 49th Operations Group at Holloman Air Force Base, New Mexico.  It was activated on 23 October 2009. The General Atomics MQ-9 Reaper (sometimes called Predator B) is an unmanned aerial vehicle (UAV) capable of remotely controlled or autonomous flight operations, developed by General Atomics Aeronautical Systems (GA-ASI) primarily for the United States Air Force (USAF).  The MQ-9 and other UAVs are referred to as Remotely Piloted Vehicles/Aircraft (RPV/RPA) by the USAF to indicate their human ground controllers.  The MQ-9 is the first hunter-killer UAV designed for long-endurance, high-altitude surveillance.  In 2006, the then–Chief of Staff of the United States Air Force General T. Michael Moseley said: "We've moved from using UAVs primarily in intelligence, surveillance, and reconnaissance roles before Operation Iraqi Freedom, to a true hunter-killer role with the Reaper." The General Atomics GNAT is a reconnaissance UAV developed in the United States in the late 1980s and manufactured by General Atomics Aeronautical Systems Inc. (GA-ASI).  As initially designed, it was a simplified version of the LSI Amber intended for foreign sales.  The GNAT 750 made its first flight in 1989.
Answer: United States Air Force (USAF)