Today's Tech: iPad Air release, UK's cyber defence force to employ hackers and Facebook reintroduces beheading videos

Apple has announced the release of the iPad Air, finally ending weeks of speculation about its fifth-generation tablet. The release was announced at its invite-only event in the Yerba Buena Center for the Arts in San francisco. The device is just 7.5mm thick and weighs 455g, with a 5-megapixel camera. It arrived with the iPad mini with Retina, a new Macbook and Macbook Pro, as well as a new OS X, Maverick.

The UK's new cyber defence force might enlist convicted hackers to join the fight against cyber-criminals and foreign intelligence services, according to its new head. Lieutenant Colonel Michael White said in a BBC Newsnight interview that with every application, he would "look at individuals in the round," and that "capability development" was more important than "personality traits" when gathering the force. the Joint Cyber Reserve is part of an initiative to improve the UK's cyber defence capabilities.

David Pipe, marketing director for ZNAPtold us at the Apps World 2013 conference: "Wallets and debit cards will be obsolete in 10 years". According to Pipe, ZNAP is the only secure mobile payment solution that simplifies all aspects of today's payments and streamlines them into one consistent user experience.

David Cameron has today called Facebook "irresponsible" for its recent U-turn on policies that banned the depiction of extreme violence on the social network. The site banned violent videos and images in May, but on Monday Facebook reversed that decision. David Cameron wrote on his Twitter feed that "it's irresponsible of Facebook to post beheading videos, especially without a warning." The company released a statement arguing that people shared the videos in order to expose and condemn them.