Prosecutors investigating Obayashi Corp. suspect the major construction firm rigged a bid in connection with a maglev train-related construction, with one of the company's vice presidents brought in voluntarily for questioning about the matter, sources close to the case said Sunday.Prosecutors searched the company's headquarters in Tokyo and other sites on Friday and Saturday to investigate possible bid rigging on contracts linked to a 9 trillion yen ($79 billion) maglev train project linking Tokyo, Nagoya and Osaka.In addition to the vice president who presides over Obayashi's civil engine…READ FULL ARTICLE