this is bbc world news, i'm lucy grey. our top stories... president biden and president putin agree to hold talks as russia's military build—up on the ukrainian border sends tensions soaring. the parents of a teenager suspected of a deadly school shooting have pleaded �*not guilty�* to involuntary manslaughter — after they were found hiding in a basement. the uk tightens its travel rules — as the omicron variant continues to spread. from tuesday, all arrivals will need a pre—departure covid test. the us network cnn fires its leading anchor, chris cuomo — the brother of the former governor of new york. and — the closures among britain's smaller abattoirs — causing a crisis for farmers, and the rural economy. we have a special report. there has to be a purpose where