British Prime Minister David Cameron will be grilled by Parliament today about a raging phone-hacking scandal linked to Rupert Murdoch's media empire. Cameron cut short his visit to Africa on Tuesday to join parliamentarians in debating the phone-hacking issue and answer lawmakers' scrutiny over his links to Murdoch's media empire in a special session of House of Commons. The scandal has forced the resignations of senior executives at News Corp and two of Britain's top policemen as well as fuelling opposition attacks on Cameron.Rupert Murdoch, his son James, former aide Rebekah Brooks and senior police officers faced lawmakers on the issue on Tuesday in an extraordinary series of Commons committee hearings.During the tense hearing, Murdoch and his son James apologised for the phone hacking. The scandal has engulfed their media empire and rocked police and politicians to the core. Cameron was criticised for employing Andy Coulson, a former editor of Murdoch's News of the World tabloid which shut down over the scandal.