Reporting from Seoul and Los Angeles - A series of aggressive federal probes into the recalls of Toyota autos are looking at whether the automaker has been less than forthcoming about the safety defects in some of its vehicles. But in Japan many believe it's the U.S. government that has something to hide. Congressional hearings on the recalls, they say, are part of conspiracy to help prop up Toyota's largest American rival, General Motors Co., which the government bailed out of bankruptcy last year, becoming the majority shareholder.