A friend is working on drones that look for smartphone signals to locate someone missing: http://www.wired.co.uk/news/archive/2014-07/16/drone-disaster-relief-s

A friend is working on drones that look for smartphone signals to locate someone missing: http://www.wired.co.uk/news/archive/2014-07/16/drone-disaster-relief-survivors http://www.wired.co.uk/news/archive/2014-07/16/drone-disaste...