The parent company of a security contractor said Thursday it is "fully cooperating" in the investigation of allegations that the contractor allowed mistreatment, sexual activity and intimidation within the ranks of private guards hired to protect the U.S. Embassy in Afghanistan...The company, ArmorGroup, North America [owned by Wackenhut, part of G4S], has a security contract with the State Department to provide services through July 2010..."...We are fully cooperating with the DOS in the investigation of the recent incidents referred to in the letter from" Project On Government Oversight, said...Wackenhut Services spokeswoman Susan Pitcher...Among the recommendations from the group: immediate military supervision of the private security guards...and consideration as to whether government forces should replace private security in a combat zone.