Terrorism and U.S. readiness to respond will continue. The military has units from all services that are well organized, trained, and equipped to conduct counterterrorist operations. The military will continue and increase the extent of cooperation that exists between the U.S. Special Operations Command and similar forces in other countries. This cooperation is particularly achieved through the training of foreign counterterrorist forces. Intelligence on terrorists is essential but difficult to obtain, since many groups are organized into cells that are difficult to penetrate. Compounding the terrorism issue is the involvement of insurgents and narcotics traffickers in terrorist activities. Another problem involves the coordination of military, police, and other organizations in dealing with terrorists. The Pentagon emphasizes both counterterrorism and what is called antiterrorism. In U.S. doctrine, antiterrorism is prevention and includes guards and fences around installations and security checks.