GROZNY, Russia (AP) — Police killed the Chechen rebel leader allegedly acting on a tip from within his network and dealing a possible blow to efforts to spread the increasingly Islam-inspired insurgency throughout southern Russia. Abdul-Khalim Sadulayev was shot Saturday during a raid on a hideout in his Chechen hometown of Argun, nine miles east of Grozny. He had been planning a terror attack in Argun to coincide with the Group of Eight summit of leading industrialized nations in St. Petersburg in mid-July, the Moscow-backed Chechen premier claimed. Wearing combat fatigues, Prime Minister Ramzan Kadyrov posed for TV cameras next...