Rescuers carry away a body of a student from the debris of the collapsed Juyuan Middle School at the earthquake site in Dujiangyan of southwest China’s Sichuan province Tuesday, May 13, 2008.(AP Photo/Color China Photo)

A soldier delivers medicine to injured victims after an earthquake in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. Picture taken May 13, 2008.REUTERS/Stringer (CHINA)

A soldier carries a wounded child as she is rescued after an earthquake in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. Picture taken May 13, 2008.REUTERS/Stringer (CHINA)

A woman carries a child who was rescued after an earthquake in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud.Picture taken May 13, 2008.REUTERS/Stringer (CHINA)

A soldier carries out relief work as a Beijing Olympics countdown board is seen in the background after an earthquake in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. Picture taken May 13, 2008.REUTERS/Stringer (CHINA)

A soldier delivers medicine to injured victims after an earthquake, from the rubble in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. Picture taken May 13, 2008.REUTERS/Stringer (CHINA)

Soldiers run to carry out relief work after an earthquake in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. Picture taken May 13, 2008.REUTERS/Stringer (CHINA)

Soldiers carrying a survivor walk from the rubble after an earthquake in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. Picture taken May 13, 2008.REUTERS/Stringer (CHINA)

A wounded person is carried out after being buried for more then 20 hours from a building that collapsed during an earthquake, in Dujiangyan, Sichuan province, May 13, 2008. Picture taken May 13, 2008.REUTERS/China Daily (CHINA) CHINA OUT

A child drinks water after being rescued from the rubble after an earthquake in Beichuan, Sichuan province May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud. Picture taken May 13, 2008.REUTERS/Stringer (CHINA)