Los Angeles ? Viewing of network news and the all-news cable channels has cooled a bit after the start of war in Iraq, although tune-in for TV news in general remains elevated, based on Nielsen Media Research estimates released Tuesday.

Results from the first full week of war coverage show that Fox News Channel stayed the most-watched cable network, averaging 4.4 million viewers, compared with 3.7 million viewing rival CNN during an average minute in primetime last week, and 1.9 million for MSNBC.

Taken together, that represents an 18 percent drop from the previous week.