this is bbc news with the latest headlines for viewers in the uk and around the world. a facebook whistle blower tells a us senate committee the tech giant put its profits first even though it knew of the harm it could inflict on children and democracy. speaking to this programme a senior executive pushed back against those claims. the amount of thought and resources that this company has put into safety, including doing research to understand these issues, just underscores how much we do care about getting these very difficult issues right. the new british foreign secretary weighs in on the us uk relationship calling it special but not exclusive . plus we ll speak to the democratic congressman who thinks a us tax on single use plastics is the way to go. and no longer one of america richest men donald trump drops off