Advertising agency Dentsu Group Inc. evacuated its headquarters in Tokyo Friday after a bomb threat was made, with security guards cordoning off the building and commercial facilities in the vicinity.The threat against the head office was made as a posting on the company's website, Dentsu said. The message with a personal name said, that "a bad company that disturbs the world will be disciplined," an informed source said.The message also said the bomb will detonate at 7 a.m. on June 7, according to police, which searched the building but found nothing suspicious.Dentsu has recently come und…READ FULL ARTICLE