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A warning to those techno-savvy lawmakers showing off on Twitter. Rep. Peter Hoekstra, the ranking member on Intelligence, broke an embargo by announcing his arrival in Iraq through the web site. "Nobody expected ... that a lawmaker with such an extensive national security background would be the first to break the silence. And in such a big way. Not only did Hoekstra reveal the existence of the lawmakers' trip, but included details about their itinerary in updates posted every few hours."