Teen codes app for Alzheimer's patients and other news

BBC Click's Jen Copestake looks at some of the best technology stories of the week including:

  • Police in China use sunglasses fitted with facial recognition technology to identify suspected criminals

  • Elon Musk launches his Falcon Heavy rocket into space

  • A teenager creates an app to help people with Alzheimer's disease remember their loved ones

See more at Click's website and @BBCClick.