Today we look at why a convicted sex offender, now wanted for an attack involving a chemical, was given permission to stay in the UK in 2020.Abdul Shokoor Ezedi is alleged to have thrown an alkali onto a woman and her two children, injuring them and nine others in the process. James is joined by BBC London reporter, Matt Graveling and immigration lawyer, Jacqueline McKenzie. And big tech is under the spotlight as Meta CEO Mark Zuckerberg and other tech bosses gave evidence to the US senate about how their companies were protecting children online. Former Facebook employee Frances Haugen and our disinformation & social media correspondent Marianna Spring explain how social media can cause harm.You can join our Newscast online community here: https://tinyurl.com/newscastcommunityhereNewscast brings you daily analysis of the latest political news stories from the BBC. It was presented by James Cook. It was made by Chris Flynn with Joe Wilkinson and Sam McLaren. The technical producer was Mike Regaard. The assistant editor was Chris Gray. The senior news editor was Jonathan Aspinwall.