Insurgent bombmakers, whose roadside explosives claimed the lives of six more American soldiers this weekend, have adopted new and grimly devious tactics, military officers said Sunday. The tactics include setting multiple charges along convoy routes, disguising bombs inside animal carcasses and planting hollow artillery shells to draw troops into an ambush, they said. One American soldier was killed early Sunday when his convoy west of Baghdad was blasted by a roadside explosive. Three soldiers died Saturday when their patrol in southeast Baghdad also fell victim to a homemade bomb. Those deaths, announced by a military spokesman on Sunday, followed an attack on Saturday with an improvised explosive device and small-arms fire in Tikrit that left two soldiers dead. Full Story