Air Transport Services Group, Inc., through its subsidiaries, provides airline operations, aircraft leasing and maintenance, and other support services primarily to the cargo transportation and package delivery industries. The company operates through two segments, ACMI Services and CAM. The ACMI Services segment provides airline operations to airlines, freight forwarders, and the U.S. Military. This segment offers aircraft, crew, maintenance, and insurance for specified cargo operations; and medium range and medium capacity airlift services. The CAM segment leases aircraft. The company also provides support services, such as scheduled aircraft maintenance, line maintenance, and crew training services; flight simulator rental services; aircraft modification, repair, and overhaul services; facility maintenance and ground equipment rental services for aircraft support; and aircraft dispatch and flight tracking services. Further, it engages in the resale and brokerage of aircraft parts; and operates mail sorting centers for the U.S Postal Service. As of December 31, 2012, the company operated a fleet of 54 aircrafts, including 48 owned and 6 leased aircrafts. It serves delivery companies, freight forwarders, airlines, and government customers in the United States and internationally. The company was formerly known as ABX Holdings, Inc. Air Transport Services Group, Inc. was founded in 1980 and is headquartered in Wilmington, Ohio.