PICHARI, Peru - Shining Path guerrillas ambushed a 30-man marine patrol in a section of steep, mountainous jungle, killing seven and wounding 10 in the Peruvian military's worst loss to rebels in at least four years, military sources said Friday. A marine captain, four other marines and two civilian guides were killed in the attack Thursday afternoon in the Ayacucho region when rebels opened fire after they stopped to take a break in a clearing, said an army officer who spoke on condition of anonymity. The attack was another strong sign of a resurgence in Shining Path activity. Last month,...