Plans for a spectacular attack on coalition forces in Iraq that would use chemical or biological weapons to kill up to 5,000 soldiers and civilians may be well under way, Fox News Mideast analyst Mansoor Ijaz is warning. "I have now heard three times in the last week, from separate sources that I have been talking to, that something big is being planned for Baghdad," Ijaz told Fox News "Special Report" host Brit Hume on Tuesday. "The idea that is being put forward is to kill as many as 3,000 to 5,000 people at one shot – something that would...