 So convincing, Helen says, ending that report by Elaine Chong. You can hear more about this story in the latest episode of BBC Trending on BBC Sounds or wherever you get your podcasts. Now, we're talking about Joe Biden. Should he stay or should he go in the US presidential race? F.A. Boyma in Bo, Sierra Leone, says what Americans should look at is the four years rule of Biden and his chronological age, not more of the debate. Always welcome your views here on Newsday on the BBC World Service.