CNN EarlyStart May 23, 2013 09:09:00
Four children buried under the massive debris of the collapsed school. suffocated by its shear weight. >> they probably would have made fit they weren't pinned. >> reporter: how were they pinned? >> pinned by different debris. desks. two by fours. pieces of metal. >> reporter: the students were not found in a basement as officials initially believed. do you think had there been an underground shelter these lives could have been saved? >> oh, yeah, most definitely. underground shelters are some of the best things to have in a tornado. >> reporter: still, there are not enough of them. even in to...