We've seen many difficult pictures from the China earthquake. It's difficult to avoid becoming numb, but this picture got my attention. How would it feel to be trapped in the rubble? How long could you hold on? Where would you find the strength to survive?

/Reuters
A survivor stretches his hand out from the debris of a collapsed building at the earthquake-hit Beichuan County, 99 miles northeast of the quake's epicenter on May 13.