Senators Call Yahoo's Delay on Hacking Disclosure 'Unacceptable'

A group of Democratic U.S. senators demanded Yahoo  explain why hackers' theft of user information for half a billion accounts two years ago only came to light last week and lambasted its handling of the breach as "unacceptable." The lawmakers said they were "disturbed" the 2014 intrusion, disclosed by the company on Thursday, was detected so long after the hack occurred.