air transport services group, inc. provides air cargo transportation and related services to domestic and foreign air carriers and other companies that outsource their air cargo lift requirements. through its principal subsidiaries, including three airlines with separate and distinct u.s. faa part 121 air carrier certificates, atsg provides air cargo lift, aircraft leasing, aircraft maintenance services, airport ground services, fuel management, specialized transportation management, and air charter brokerage services. major subsidiaries include - abx air, inc. (www.abxair.com) - air transport international llc (www.airtransport.cc) - capital cargo international airlines, inc. (www.capitalcargo.com) - airborne maintenance & engineering services, inc. (www.airbornemx.com) - airborne global services, inc.