WILTON, Conn., April 21 -- GE Infrastructure, a unit of General Electric Co., recently agreed to acquire InVision, a Newark, Calif., maker of explosives detection systems based on advanced computed tomography (CT) technology, x-ray diffraction and quadrupole resonance, in an all-cash transaction valued at approximately $900 million, or $50 per share. GE said the acquisition enhances its capabilities in explosive detection and security technologies. "This acquisition is a game-changing event for the security industry," said GE Infrastructure President and CEO Bill Woodburn. 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