Ok, so I was trying to figure out what CNN might mean by saying that:
"When Bush's ultimatum expires, around 8 p.m. ET Wednesday, virtually the brightest moon of the month will be hanging over Iraq throughout the night, which is not considered ideal for the U.S. military which "owns the night."
I never really found out, but I did learn that "the sniping profession is misunderstood by many." And that there are "Tactics, Techniques and Procedures (TTP) for "Owning the Night!'"