this is bbc news with the latest headlines for viewers in the uk and around the world. facebook whistleblower frances haugen has told british politicians that the social network is "unquestionably making hate worse". new details emerge of the fatal shooting of a crew member on a film set. legal papers reveal alec baldwin was pointing a revolver at a camera during rehearsal when it fired. a warning on climate change — the world is way off track in limiting rising temperatures says the un. and explosive allegations that the organisers of the january 6 storming of capitol hill had planning meetings with members of congress.