Anna Doble

A secret network which looks and works like Facebook is being used by world leaders to chat in real-time. Channel 4 News reveals how it’s shaping the way G20 nations communicate in 2011.

The latest man arrested in the News of the World phone-hack inquiry worked as a PR consultant for the Met Police. Neil Wallis also dined with top officers Sir Paul Stephenson and John Yates.

A defiant Rupert Murdoch says he will challenge some of the “total lies” said in Parliament as he and his son are summoned to appear before MPs.

Rupert Murdoch withdraws his BSkyB takeover bid as David Cameron vows to end the “ugly chapter” of phone hacking. Here’s how the day unfolded.

As Met Police chief John Yates admits making decisions in the phone-hack inquiry which proved “damaging”, Channel 4 News looks at the missed chances which have triggered calls for him to quit.

Rupert Murdoch’s biographer tells Channel 4 News the tycoon “is in more trouble than he has ever been in” and questions News Corp’s entire future after another dramatic day in the phone-hack crisis.

As Downing Street, the Met police and News International reel from the News of the World phone-hacking scandal, Channel 4 News asks if people power helped “keep the story alive”.

James Murdoch announces the News of the World is to shut down because of the phone-hacking scandal. He says “wrongdoers turned a good newsroom bad”. See how the story unfolded.

Police reveal there are 4,000 possible victims of phone hacking as the IPCC tells Channel 4 News it may move to take full control of an inquiry into alleged payments by journalists to Met officers.

Rupert Murdoch is standing by Rebekah Brooks as calls grow for her to resign from News International because of the phone hacking scandal. Add your voice to the live blog.

The mass exodus of starving Somali refugees is becoming an unbearable crisis as aid agencies launch an emergency appeal to help millions facing the worst east African drought in decades.

A 19-year-old charged with carrying out a cyber attack on the UK’s Serious Organised Crime Agency is said to be “keen” to help with the police investigation. Ryan Cleary has appeared in court.

Nations which carry out drone attacks must confirm and report who is killed, say lawyers in a newly published study on the legality of attacks by the unmanned aircraft.

A self-proclaimed former computer hacker talks to Channel 4 News about cyber crime in 2011, the role social media is playing and why he thinks hackers could become “more dangerous than al-Qaeda”.

Hackers at LulzSec deny targeting the UK census as a suspected member of the group is questioned by police. But a security expert tells Channel 4 News they may be inciting “cyber riot”.