Congress authorises expansion of robotic warfare technology favoured by Obama

Mitt Romney was poised to clinch the Republican presidential nomination after yesterday's Texas primary, a largely uncontested poll that will formalise the former Massachusetts Governor's status as President Barack Obama's challenger in the election in November.

Germany's opposition leader says that Chancellor Angela Merkel has accepted the need to add a separate set of measures promoting growth to the European Union's treaty enshrining fiscal discipline.

President Barack Obama and Nato leaders expressed confidence in Afghanistan's ability to take the lead for its own security next year, as nations with a stake in the deeply unpopular war met today for talks aimed at paving the way for its end.

Nationalist candidate Tomislav Nikolic won the Serbian presidency, a result that adds to the political turmoil in the Balkan country and could slow down its attempts to join the European Union.

Eyewitness: There are droves of old-school peace activists and war veterans, but many of the younger attendees have a broader economic agenda

The Serb nationalist Tomislav Nikolic has won the presidential elections in Serbia, defeating the pro-European and reform-oriented incumbent Boris Tadic.

One man was arrested on terrorism-related charges and another for possession of explosives, bringing the number of people arrested to five ahead of the NATO summit on Sunday in an alleged plot to target U.S. President Barack re-election headquarters.

Out of America: As students prepare to graduate saddled with record levels of debt, the parallels with the sub-prime mortgage crisis are hard to ignore

Camp David is the presidential retreat where history is made

The suicide of Bobby's daughter-in-law re-opens the old debate. By Rupert Cornwall

The curse of the Kennedy family has struck again after Mary Richardson Kennedy, the estranged wife of Robert F Kennedy Jr, was found dead today.