Queen, Duchess of Cambridge encounter robotic arm at London's King's College

Britain's Queen Elizabeth and Kate, Duchess of Cambridge, opened a research centre at King's College university in London on Tuesday and the duchess gave a tentative handshake to a robotic arm.

The pair opened Bush House, a newly converted suite of lecture theatres and teaching rooms at the university, and met students from the Centre for Robotics Research and Entrepreneurship Institute. (Reporting by Reuters television Writing by Alexandra Hudson Editing by Frances Kerry)