Senators accuse Yahoo of 'unacceptable' delay in hack discovery

By Dustin Volz WASHINGTON (Reuters) - Six Democratic U.S. senators on Tuesday said it was "unacceptable" that Yahoo only last week announced a 2014 hack into 500 million user accounts and asked embattled CEO Marissa Mayer for more information about the company's investigation into the data breach. "That means millions of Americans’ data may have been compromised for two years," the senators wrote in a joint letter addressed to Mayer. "This is unacceptable." Yahoo did not immediately respon