An off-duty police officer went to a Rochester, N.Y., medical clinic to get a magnetic resonance imaging exam, he told the technician he was armed, but the technician said that was no problem. Bad advice: as the officer approached the machine, its magnets yanked the gun through the air. The gun fired, but no one was injured. It took three hours to power down the MRI before technicians could pry the weapon free from the machine. “Until we send this gun back to the factory, we’re not even going to test-fire it,” said a police firearms expert. “The metal is more brittle than it should be,” he said, adding that the magnet is four times as powerful as a junkyard magnet that lifts cars. (AP) ...Next week, the Federal Aviation Administration will announce the most effective airport security scanner ever.