Microsoft said Thursday in a blog post that hackers tied to a massive intrusion of dozens of U.S. government agencies and private companies sneaked further into its systems than previously thought, although the intrusion doesn’t appear to have caused any additional harm

WASHINGTON – With Election Day less than a week away, the CEOs of Facebook, Google and Twitter on Tuesday appeared virtually before a Senate panel where lawmakers grilled them over their influence in the election and a once-obscure law that has drawn criticism from Republicans and Democrats.