4-145. Indirect support by federal military forces to counterdrug agencies requires approval by the Secretary of Defense or a designated representative. Three standing joint task force headquarters provide indirect support to domestic civilian law enforcement agencies. Joint Task Force-North supports counterdrug efforts within the USNORTHCOM AOR. Joint Task Force-West does the same in the USPACOM AOR. The Joint Interagency Task Force South operates in the United States Southern Command AOR. The missions vary widely and may include ground reconnaissance, detection and monitoring, communications support, aerial reconnaissance, marijuana eradication, linguist support, air and ground transportation, intelligence analysis, tunnel detection, engineering support, and maintenance support.