no one's favorite part of the travel experience, but what they're looking at is the possible checkpoint of the future of one u.s. airport. that could change. they're also working with researchers to develop sensors that could be tucked inside of checkpoints aimed at spotting explosives, and that's something you and i will probably never actually see. in a field outside providence university of rhode island researchers are working on new ways to detect and stop explosives popular with terrorists. >> one. >> reporter: they're partnering with the department of homeland security on this sensor. they call it a digital dog nose. it will soon be the size of a cell phone, or able to be mounted on a drone and can detect homemade explosives as well as better than a bomb-sniffing dog. they've also created a gel called schmoo that can surround a explosive and flash freeze it. professor jenny oxley. >> we talk about how to detect