Apple has unveiled the "iPad Air", a slimmer version of its top-selling full-size tablet, and a revamped iPad Mini, bidding to fend off rivals who have eroded its market dominance.

The new products will likely fuel the trend of mobile devices vanquishing old-school personal computers, but the launch failed to catch fire with investors, as Apple shares dipped following Tuesday's highly-awaited event.

Facebook yanked a beheading video from the social network late Tuesday following outrage over its lifting of a ban on the gory imagery.

The flip flop came as Facebook aimed to balance the diverse sensitivities of its billion-plus members with a desire to be a platform for free speech and real-world news stories.

British Prime Minister David Cameron on Tuesday condemned Facebook as "irresponsible" after the social networking site lifted its ban on users posting videos of beheadings.

Cameron said "worried parents" needed to hear an explanation from the U.S.-based website.

Nokia is expanding its lineup of Windows phones and introducing its first tablet computer, all sporting the powerful camera technology found in its flagship Lumia 1020 smartphone.

The struggling cellphone maker is turning to the camera to differentiate its phones from rivals. The Lumia 1020 has a 41-megapixel camera with technology designed to produce better low-light shots and offer greater manual controls than most smartphones.

The U.N. atomic agency said Tuesday that some of its computers were infected by malicious software, in its second embarrassing IT slip-up over the past year.

The International Atomic Energy Agency, which holds highly sensitive information on its member states' nuclear facilities, said however that none of its data was compromised.

Facebook sought to entice media outlets to post more news stories at the leading social network Monday, helping pinpoint promising pieces -- a tactic aimed at combating Twitter.

A "Stories to Share" feature added to Facebook pages of news organizations was designed to find engaging stories and let them be shared, according to vice president of media partnerships Justin Osofsky.

Yahoo on Monday announced that it hired New York Times reporter David Pogue to head a grand expansion of consumer-focused technology news.

Pogue's hiring came as the faded Internet search star continued a quest to redefine itself as an online venue for "premier digital content."

Britain has agreed to build the country's first nuclear power plant in a generation, ignoring concerns raised by the Fukushima meltdown in Japan as the UK seeks to secure its future energy needs and cut greenhouse gas emissions.

The government struck a deal with Electricite de France and a group of Chinese investors Monday to build the country's first nuclear power plant since 1995 — a massive project that will bring in 16 billion pounds ($25.9 billion) of investment to keep the lights on amid declining supplies of North Sea gas and rapidly escalating fuel costs.

Apple is expected to rev up its iPad line Tuesday as the tablet market heats up with competition from devices powered by software from Google and Microsoft.

Analysts agree that iPads will star at an invitation-only event being held in San Francisco on the cusp of the prime year-end holiday shopping season.

Google-owned online ad-placing service DoubleClick on Friday announced that the way has been cleared to include space at Facebook.

Google had previously been shut out of the social network's advertising network, with no reasons given for the exclusion or the change of heart.