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A U.S. Army soldier from 3/1 AD Task Force Bulldog uses his night vision equipment before an early morning joint patrol with Afghan National Army (ANA) soldiers in a village in Kherwar district in Logar province, eastern Afghanistan, May 22, 2012. REUTERS/Danish Siddiqui

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A cross is seen in Joplin, Missouri May 17, 2012. May 22 marks the one year anniversary of a deadly EF-5 tornado that ripped through the town, killing 161 people. The tornado damaged or destroyed about 7,500 homes and 500 other buildings, but the city is now well into a recovery mode that has spurred some segments of the local economy. REUTERS/Eric Thayer (UNITED STATES - Tags: DISASTER ENVIRONMENT RELIGION)

Joplin, one year after

May 22 marks the one year anniversary of a deadly tornado that ripped through Joplin, Missouri, killing 161 people.  Slideshow 

FACTBOX: World's most powerful computers

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LONDON | Mon Jan 14, 2008 11:15am EST

LONDON (Reuters) - Britain's most powerful supercomputer was unveiled on Monday.

Here are the world's five fastest computers, listed by name, location and performance in teraflops, or trillions of calculations per second.

1) Blue Gene/L. Lawrence Livermore National Laboratory, California. 478.2 teraflops (TFlop/s).

2) Jugene. Juelich research centre, Germany. 167.3 TFlop/s.

3) SGI Altix ICE 8200. SGI/New Mexico Computing Applications Center, Wisconsin. 126.9 TFlop/s.

4) EKA. Computational Research Laboratories, India. 117.9 TFlop/s.

5) Cluster Platform 3000 BL460c. Unspecified government agency location, Sweden. 102.8 TFlop/s.

(Source: www.top500.org. November 2007)
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