The doctors were sent by the organization "Doctors for Human Rights", and are to return to Israel on Sunday.
Vitamin D, found in fish and produced by sun exposure, can help stave off the mental decline that can affect people in old age, a study has suggested.
UK and US researchers looked at 2,000 people aged 65 and over. 2,000 people aged 65 and over. They found that compared to those with the highest vitamin D levels, those with the lowest were more than twice as likely to have impaired understanding.
The UN's special torture rapporteur called on the US Tuesday to pursue former president George W. Bush and defence secretary Donald Rumsfeld for torture and bad treatment of Guantanamo prisoners.
"Judicially speaking, the United States has a clear obligation" to bring proceedings against Bush and Rumsfeld, the United Nations Special Rapporteur on Torture Manfred Nowak said, in remarks to be broadcast on Germany's ZDF television Tuesday evening.
Prime Minister Ehud Olmert has put the justice minister in charge of defending Israel against charges of war crimes during its 22-day Gaza assault, a government source said Friday.
Israel's military censor has already banned the publication of the identity of the unit leaders who fought against Hamas Islamists on the Gaza Strip for fear they may face war crimes charges.
UN Secretary General Ban Ki-moon demanded Tuesday that those responsible for bombing UN buildings in the Palestinian territory should be made accountable and accused Israel of using excessive force.
The BBC has refused to broadcast a national humanitarian appeal for Gaza, leaving aid agencies with a potential shortfall of millions of pounds in donations.
The Disasters Emergency Committee (DEC), an umbrella organisation for 13 aid charities, launched its appealtoday saying the devastation in Gaza was "so huge that British aid agencies were compelled to act".
But the BBC made a rare breach of an agreement dating back to 1963 when it announced it would not give free airtime to the appeal. Other broadcasters then followed suit. Previously, broadcasters have agreed on the video and script to be used with the DEC, with each station choosing a presenter to front the appeal, shown after primetime news bulletins.
Mohammed Akhtiar was among the more than 770 terrorism suspects imprisoned at the U.S. naval base at Guantanamo Bay, Cuba, after the Sept. 11, 2001, terrorist attacks. They are the men the Bush administration described as "the worst of the worst."
But they had the wrong guy. Local anti-government insurgents had fed false information to U.S. troops.
Israel's invasion of Gaza has strengthened the hand of extremists and only a credible independent investigation into alleged wrongdoing can quieten growing Palestinian anger, a U.N. aid official said on Friday.
TVNL Comment: As if that could ever happen!
President-elect Barack Obama appointed a defense contractor's lobbyist Thursday to become the No. 2 official at the Defense Department, a choice that appeared to break with his self-imposed rules to keep lobbyists at arm's length.
William J. Lynn III, Obama's choice for deputy defense secretary, is a former Pentagon official who now is senior vice president for government operations at Raytheon Co. Lynn hasn't been a registered lobbyist since July, meaning he can't personally lobby Congress or the White House.
In the first three months of 2008, his lobbying team reported spending $1.15 million to influence issues including missiles, sensors and radar, advanced technology programs and intelligence funding.
TVNL Comment: Well that didn't take long. Welcome back to reality.
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