Washington, November 2 : Studying what happens if drivers combine extended driving and sleep deprivation, a team of researchers has shown that fatigue connected to the duration of driving very significantly increases the risk of accidents at night.

Experts from CNRS, Inrets, the University of Bordeaux and the University of Stockholm say that their study was able to determine whether 2, 4 and 8 hours of nocturnal driving affected driving performance differently.

Washington - The campaign of Democratic presidential candidate Barack Obama has said he wasn't aware that his Kenyan aunt was reportedly living in the US illegally, the Washington Post reported Sunday.

The news about Zeituni Onyango, who is referred to as aunty Zeituni in Obama's memoir, surfaced just as the presidential candidates start counting down hours, not days, to Tuesday's election.

Some Democrats have alluded to the fact that the timing of the disclosure seems politically motivated, as it was apparently leaked to a media outlet by a government official. Obama's Republican rival John McCain did not raise the issue on the campaign trail Saturday.

Washington - Which version of Vista is right for your computer? Download and run the Windows Vista Upgrade Advisor
(http://www.microsoft.com/windows/windows-vista/get/upgrade-advisor.a spx). This utility will help you determine which version of Vista best suits your needs, and it will tell you whether your existing computer is up to the task of running the version of Vista you desire. The Advisor works with Windows XP and Vista systems.

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Washington - The million-dollar bounty is still up for grabs.

That's the amount US publisher Larry Flint is offering "for documented evidence of illicit intimate relations with a congressman, senator or other prominent officeholder."

With full-page adverts in the Washington Post, the publisher of the sex magazine Hustler sought to stimulate anonymous tips about the Capitol Hill scene, in an effort to grab headlines and shock the country before Tuesday's presidential elections.

Nothing provokes more interest in the United States than the dirty laundry of politicians - precisely because an extremely decent citizen's life is expected of every candidate.

Washington - Five months ago, at the start of the US general election, much of the talk was of disaffected Hillary Clinton voters leaving the Democratic Party and throwing their weight behind Republican John McCain.

Female voters who backed Clinton's historic candidacy were enticed by McCain's selection of Alaska Governor Sarah Palin as a running mate. The McCain campaign also hoped working class voters who plumped for Clinton could be convinced to switch sides in a repeat of the 1980s elections that swung on so-called "Reagan Democrats."

Washington - Leaving nothing to chance and taking no vote for granted, the two US presidential candidates kept up a frenetic pace Saturday as they plunged into the last weekend of campaigning before Tuesday's election.

Democratic Party presidential candidate Barack Obama is increasing his lead over Republican rival John McCain as the campaign enters its final phase, according to a poll published Saturday by the Washington Post.

It said 53 per cent of the electorate would vote for Obama, compared to 44 per cent for McCain. Obama also led in several key states seen as decisive in the election.