Dog training technique helps robot learn and other news

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

  • US motorcycle brand Harley Davidson reveals an electrical bicycle

  • The heads of Google, Facebook and Twitter faced more than three and a half hours of questioning from US senators

  • A robot at Johns Hopkins University learns tasks more quickly using techniques inspired by dog training

See more at Click's website and @BBCClick