olunteers with the Minuteman Civil Defense Corps are headed for the Arizona-Mexico border Friday to provide backup for National Guard troops in response to an incident near Sasabe in which the approach of armed men forced soldiers to retreat. About 11 p.m. Wednesday, soldiers with a National Guard Entry Identification Team - which provides additional eyes and ears for the U.S. Border Patrol and notifies them of suspicious activity - saw a group of armed individuals approaching them in the desert, said Mario Martinez, spokesman for the U.S. Customs and Border Protection's Border Patrol Office. The individuals came within 100...