for watching. we appreciate your time. tonight on "world news" -- boiling point. new details about the veteran u.s. soldier who went door to door on a one-man massacre. gas spike. anger over the rising price of gas and what it means for your commute. red meat. revealed. the new numbers showing how just one serving a day could shorten your life by years. and the da vinci code. the art detective who cracked a 500-year-old mystery. is this leonardo's lost masterpiece? good evening. we begin tonight with the news of that american soldier accused of putting on his night vision goggles and then methodically going door to door, killing children and families in their homes in afghanistan.