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People's health could be harmed by social networking sites because they reduce levels of face-to-face contact, an expert claims.

A lack of "real" social networking, involving personal interaction, may have biological effects, he suggests. He also says that evidence suggests that a lack of face-to-face networking could alter the way genes work, upset immune responses, hormone levels, the function of arteries, and influence mental performance. This, he claims, could increase the risk of health problems as serious as cancer, strokes, heart disease, and dementia.

Dr Sigman maintains that social networking sites have played a significant role in making people become more isolated.

A crowd of more than 10,000 young Moldovans materialized seemingly out of nowhere on Tuesday to protest against Moldova’s Communist leadership, ransacking government buildings and clashing with the police.

The sea of young people reflected the deep generation gap that has developed in Moldova, and the protesters used their generation’s tools, gathering the crowd by enlisting text-messaging, Facebook and Twitter, the social messaging network.

The protesters created their own searchable tag on Twitter, rallying Moldovans to join and propelling events in this small former Soviet state onto a Twitter list of newly popular topics, so people around the world could keep track.

There's a quiet revolution underway at the CIA and its sister agencies. A new generation of analysts, determined to drag their Cold War–era colleagues into the world of Web 2.0 information-sharing, have created Intellipedia, a classified version of Wikipedia they say is transforming the way U.S. spy agencies handle top-secret information by fostering collaboration across Washington and around the world.

One of the biggest hurdles was convincing security-minded spies that the system would be safe from outsiders. To assuage them, Intellipedia was built into the existing secure and classified networks known as Intelink, which connects the 16 spy agencies in the U.S. as well as the U.S. military, the Department of State and other agencies with access to intelligence.

Last September, the Director of National Intelligence rolled out a social-networking site called A-Space, with linked video and photo programs. A-Space has some 8,619 accounts, all of them top secret, but insiders say it is troubled and slow to get off the ground; at one point it was suspended because particularly sensitive intelligence was misused. New efforts at tagging and instant-messaging have also been slow.

Over the past year, at least seven Roma have been killed in Hungary, and Roma leaders have counted some 30 Molotov cocktail attacks against Roma homes, often accompanied by sprays of gunfire.

Experts on Roma issues describe an ever more aggressive atmosphere toward Roma in Hungary and elsewhere in Central and Eastern Europe, led by extreme right-wing parties, whose leaders are playing on old stereotypes of Roma as petty criminals and drains on social welfare systems at a time of rising economic and political turmoil. As unemployment rises, officials and Roma experts fear the attacks will only intensify.

In the Czech Republic, where radical right-wing demonstrators have clashed with the police as they tried to march through Roma neighborhoods, a small child and her parents were severely burned after assailants firebombed their home in the town of Vitkov this month. The police in Slovakia were caught on video recently tormenting six Roma boys they had arrested, forcing them to undress, hit and kiss one another.

The online generation thinks: If the news is that important, it will find me. My son who has never subscribed to a print newspaper, gets his news from Facebook, Twitter or from friends. He no longer treats traditional media as a magnet. People now get their messages by relying on other people they trust.

SPIEGEL ONLINE: So what role, in your opinion, can newspapers still play?

arvis: They certainly no longer want to be in the paper business because that is dying out. The information business might be fine but there is no scarcity of information and news online. They could, however, be very effective in the collection business -- just find the best of the stuff that is out there online. They could also use their strong brands to compete in the business of elegant organization by creating information platforms or venturing into new markets. The New York Times has just started a new local program in New York enlisting my journalism students to collaborate online with them to report on their communities. That is the right approach. News outlets need to think distributed, they must collaborate with bloggers or social networking sites. On my blog, I have links to Google News or Google Maps. Innovative newspapers like the Guardian in Britain are equally open to cooperation. They make all their content available free online, they link to all sorts of sites, and in turn they receive more links in return.

Facebook users have voted to back changes which give them control over data and content they post on the site. Early results suggest 75% of those who voted support the proposals.

The vote was triggered by changes Facebook made to its terms and conditions in February. The move drew fire because it appeared to hand the social network site ownership of images, videos and data that users posted on profile pages. Low turnout In response to the criticism, Facebook withdrew the changed terms, wrote a new set and invited its 200 million members to make their views known.

In total about 600,000 people took part in the week-long vote. Initially, Facebook said it would only adopt those new terms if 30% of its members voted in support of them.

Russia backed Mr. Voronin

At a news briefing, a State Department spokesman, Robert A. Wood, also expressed concern about the violence, but he said policy makers in Washington had not yet assessed whether the elections had been free and fair.

Mihai Moscovici, 25, who provided updates in English all day over Twitter, painted a more nuanced picture. He said the gathering on Monday night drew only several hundred people. The protesters agreed to gather the next morning and began spreading the word through Facebook and Twitter, inventing a searchable tag for the stream of comments: #pman, which stands for Piata Marii Adunari Nationale, Chisinau’s central square. When Internet service was shut down, Mr. Moscovici said, he issued updates with his cellphone.