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The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

The latest in military technology is showcased at the Soldier Technology US 2008 event in Arlington, VA on Tuesday, January 15, 2007.

Vatican City, January 29th 2006 - Saint Peter's Basilica - Pope Benedict XVI during the Angelus for children of Catholic Action celebrated from the wi...

Vatican City, December 24th 2007 - Saint Peter's square - Christmas Eve - Pope Benedict XVI lighting a candle in his private studio

Russian President Vladimir Putin listens to Greece Prime Minister Costas Karamanlis, unseen, during a news conference in Moscow's Kremlin on Tuesday,...

Rome, December 8th 2007 - Piazza di Spagna - Pope Benedict XVI celebrating the Feast of the Immaculate Conception

Mandatory Credit: Photo by Jonathan Hordle / Rex Features (717588ae) Louise Adams Playhouse Disney's show 'Bunnytown Christmas Winter Wonderland' P...

Vatican City, November 21st, 2007 - St Peter's Square - Pope Benedict XVI during the General Audience

A vendor at the Spec Ops convention displays an anti-tank missile.

A remotely-controlled helicopter armed with a digital camera and machine gun on display at the Spec Ops convention.

A vendor at the Spec Ops convention displays a robot equipped with a small caliber machine gun.

A vendor at the Spec Ops convention displays a sniper rifle with a long barrel.

A vendor at the Spec Ops convention displays a helmet equipped with night vision goggles.

A vendor at the Spec Ops convention displays a saw akin to the jaws of life.

A remotely-controlled helicopter armed with a digital camera and machine gun and a tracked-robot with a machine gun on display at the Spec Ops convent...

A tracked-robot with a machine gun on display at the Spec Ops convention.

A tracked-robot with a machine gun on display at the Spec Ops convention.

FILE - This file photograph taken Oct. 30, 2007 shows the exterior of security software maker McAfee Inc. headquarters in Santa Clara, Calif. Chip mak...

Russian President Vladimir Putin listens during a Railway Congress in Moscow's Kremlin on Wednesday, Oct. 24, 2007. About four thousand railway work...

People stand on a North Rim overlook at Grand Canyon National Park in Arizona. (Photo by Bob Downing/Akron Beacon Journal/MCT/Sipa USA)

The Widforss Trail runs largely across a plateau on the North Rim on the Grand Canyon in northern Arizona. It is a 4.8-mile, one-way hike with rim vie...

People walk in a street of Villa 20, a shantytown with a population of 25,000 people and which extends over 29 blocks, in Buenos Aires, October 2007....

People walk in a street of Villa 20, a shantytown with a population of 25,000 people and which extends over 29 blocks, in Buenos Aires, October 2007....

View of the house of a "cartonero" -a person who collects cardboard and other recyclable items to sell- in Villa 20, a shantytown with a population of...

View of a sign offering a house for sell at the entrance of another house in Villa 20, a shantytown with a population of 25,000 people and which exten...

An Argentine flag flutters in the backyard of a house of Villa 1-11-14, a shantytown with a population of about 45,000 people and which extends over 3...

A sign offering food for sale is displayed in a house of Villa 1-11-14, a shantytown with a population of about 45,000 people and which extends over 3...

Two men work in the building of a house in Villa 1-11-14, a shantytown with a population of about 45,000 people and which extends over 35 blocks, in B...

People line up at a soup kitchen to get donated food in Buenos Aires, Wednesday Oct. 3, 2007. Since the economic crisis of 2001, poverty and unemploy...

Pope Benedict XVI blesses believers as he holds his weekly general audience in St Peter's square at the Vatican 26 September 2007.

Mandatory Credit: Photo by Roy Garner / Rex Features (714285af) Communal toilet in a hutong lane, near Qianmen, Beijing, China Beijing, China - 200...

Mandatory Credit: Photo by Roy Garner / Rex Features (714285ag) Communal toilet in a hutong lane, near Qianmen, Beijing, China Beijing, China - 200...

Russian President Vladimir Putin feeds a calf while touring a milk farm in the village of Zorinskiye Dvory in the western Belgorod region of Russia on...

Russian President Vladimir Putin feeds a calf while touring a milk farm in the village of Zorinskiye Dvory in the western Belgorod region of Russia on...

Le dresseur Ludwig Syppmeyer avec ses elephants lors d'une representation du Cirque Arlette Gruss pres de Montpellier. Une campagne de sensibilisation...