Twitter chief meets with US secretary of state

Twitter chief Dick Costolo met on Friday with US Secretary of State Hillary Clinton a...

Tweet 'buy' to purchase flights by Twitter

With Chirpify, TweetAFlight could help change Twitter into a transactional service. It might take some of the hassle out of flying too. ...

Ex-terrorist network? ‘Facebook’ for former extremists

From Islamic Jihadists to neo-Nazis, over a thousand former extremists and their victims are connecting online to tackl...