Lachlan Murdoch, a son of News Corporation Chief Rupert Murdoch, leaves his father's London home on July 20, 2011. Australian Prime Minister Julia Gillard on Wednesday warned Rupert Murdoch's Australian arm it faced some "hard questions" as calls intensified for a media inquiry following the British hacking scandal. Gillard declined to comment on Murdoch's grilling by British MPs over the outcry that saw him close tabloid News of the World and dump his bid for satellite broadcaster BSkyB, but said the Australian public was concerned. AFP PHOTO/CARL COURT

ATTENTION EDITORS: THIS IMAGE MUST NOT BE USED AFTER 1600 GMT ON JULY 20, 2011 A screen grab image taken in London on July 19, 2011, shows News International Chairman James Murdoch giving evidence to a Parliamentary Select Committee on the phone hacking scandal. News Corp. chief Rupert Murdoch told British lawmakers "this is the most humble day of my life" at the start of a parliamentary hearing Tuesday over the News of the World phone hacking scandal. AFP PHOTO/PARBUL

Lachlan Murdoch, a son of News Corporation Chief Rupert Murdoch, leaves his father's London home on July 18, 2011. Shares in Rupert Murdoch's embattled News Corporation plummeted in Australian trade on Monday as the escalating phone hacking scandal continues to hurt the global company's image. AFP PHOTO/Leon Neal

(FILES) A file picture taken on March 18, 2010, shows News Corporation Chief Rupert Murdoch (L) and his son James at the Cheltenham Racing Festival in central England. British lawmakers formally summoned Rupert Murdoch and his son James Thursday July 14, 2011, to testify over the phone hacking scandal as the arrest of another ex-employee piled more pressure on the media mogul. AFP PHOTO/Adrian Dennis/FILES

Actress Nicole Kidman, center left, sits next to Lachlan Murdoch, son of media mogul Rupert Murdoch, during the match between Venus Williams and Daniela Hantuchova at the US Open tennis tournament in New York, Friday, Sept. 2, 2005. (AP Photo/Gregory Bull)

News Corporation's Rupert Murdoch arrives with his daughter Grace Helen, 3, for the annual Allen and Co.'s media conference Tuesday, July 5, 2005, in Sun Valley, Idaho. (AP Photo/Douglas C. Pizac)

The Australian-born chief executive of News Corporation, Rupert Murdoch, front left, sits next to his son and deputy chief operating officer of News Corporation, Lachlan Murdoch, front right, during a service held by Reuters at St Bride's Church on Fleet Street, in central London, Wednesday, June 15, 2005. For over 300 years, London's Fleet Street was the heart of British journalism, home to many of the country's leading newspapers and the pubs that fueled their employees. On Wednesday, however, the industry saluted the end of an era at a ceremony marking the departure of Reuters from its Fleet Street headquarters. (AP Photo/Matt Dunham)

Newspaper proprietor Rupert Murdoch, right, with his daughter Prudence, 26, center, and new son-in-law Crispin Odey, when the couple were married at St. Michaels Church, Chester Square, Friday, May 24, 1985, London, England. Crispin, the only son of Mr. and Mrs. Richard Odey of Hotham Hall, Yorkshire, is an insurance broker. The rest of the group is unidentified. (AP Photo/Joe Schaber)