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Attacks on US troops in Middle East have diminished, Pentagon says
The four-day break has been the longest since steady attacks began on Oct. 17.
Iranian-backed group vows to expand conflict if US airstrikes continue
U.S. fighter jets struck a Kataib Hezbollah operations center and a command-and-control node south of Baghdad on Tuesday, two defense officials said.
By Tara Copp, AP and Kareem Chehayeb, AP