In-flight security regulations appear to be in a state of flux days after a Nigerian man allegedly tried to bring down a Northwest Airlines flight from Amsterdam to Detroit. In memorandums to airlines over the weekend, TSA said passengers would be subject to additional screening and must remain in their seats during the last hour of international flights. But an official at Cathay Pacific said her airline had received revised instructions by Monday. "The latest version indicates more generally that carriers must ensure that passengers remain in their assigned seats when directed by the flight crew," she said. Domestic travel appeared somewhat less affected by the security scare. "The only thing that people traveling domestically are going to notice is increased police presence and greater use of canine explosive-detection teams," said a spokesman for the Minneapolis-St. Paul International Airport.
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