VIDEO - An electronic nose to sniff out disease

Our cell phones have evolved into multi-functional digital assistants. Nate Lewis, a Professor of Chemistry at Caltech, and his colleagues are working on technology that could turn your next smartphone into a bomb-sniffing, disease-diagnosing "electronic nose." In this video, Caltech grad student Heather McCaig showed us around Nate's lab to give us the inside scoop on this promising technology and how they are developing it.