Wabtec Corp. (NYSE: WAB), which is set to close on a merger with GE Transportation (NYSE: GE) on Feb. 25, is seeking "massive concessions" in pending agreements with the United Electrical, Radio, and Machine Workers of America, according to a news release from the union Wednesday. The move could impact operations at the Erie Locomotive Plant, one of the division's most profitable facilities. "Under the current agreement with GE, UE members run a highly profitable plant, and are rewarded...