Building collapses are common throughout the world. They can crumble without warning, and can take tens of thousands of lives in an instant. Whether caused by a tornado, earthquake, an act of terrorism or poor construction, the aftermath of a collapsed building can be just as deadly as the collapse itself. Unstable floors and walls pose hazardous threats to rescue workers and leave them with one option: risk their lives to save another. But that may be about to change. Join Tim Samaras and his team of engineers as they test and transform surveillance technology into a search and rescue tool that gives rescuers a look deep inside a collapsed building without stepping one foot inside.