KANDAHAR, Afghanistan - Four U.S. soldiers face disciplinary action for burning the bodies of two Taliban rebels _ a videotaped incident that sparked outrage in Afghanistan _ but they will not be prosecuted because their actions were motivated by hygienic concerns, the military said Saturday. TV footage recorded Oct. 1 in a violent part of southern Afghanistan showed American soldiers setting fire to the bodies and then boasting about the act on loudspeakers to taunt insurgents suspected to be hiding in a nearby village.