US President Barack Obama: 'We have to make cyber space safer'
US President Barack Obama has urged technology companies to give the government greater help to improve cyber security.
At a White House-sponsored meeting at Stanford University, Mr Obama said cyber threats posed a challenge to national security, public safety and the economy.
He called on private companies to share more information with each other, and the security services.
Laura Trevelyan reports.
14 Feb 2015
- From the section US & Canada