Twenty years after the Berlin Wall came down, we talk to Ros Atkins, host of the BBC's World Have Your Say, live from Berlin. We're also joined by two Germans – one from the West and one from the East – to tell us about how their lives changed that one day. Christoph Niemann was a teenager in the West who remembers the day vividly. These days, he regularly rides his bicycle over the line where the wall once stood. Luise Stauss lived in East Germany at the time; she says she always felt like she stood out when she went to the West after the wall fell.