Read the article from the site you posted..specifically this:
“The remaining U.S. military casualties were divided between a five-person regular Army aircrew and three Air Force combat controllers, said a special ops source who has been briefed on the incident. The use of a regular Army Chinook to fly a JSOC mission was “atypical,” the source said. Most JSOC missions involving helicopters are flown by the Army’s 160th Special Operations Aviation Regiment (Airborne).”