Threads - Meta's challenge to Twitter - launches to huge fanfare

Facebook's Meta launches a new social media platform - Threads - to rival Twitter but what will it mean to Elon Musk's platform; we speak to our tech correspondent.
Ukrainian officials say a Russian missile has hit an apartment block in the city of Lviv - destroying 50 apartments.
The United Nations hosts an Artificial Intelligence conference to discuss how the technology can be harnessed for common good.