and in europe — there has been another flurry of diplomatic visits to kyiv and moscow. turkey's leader, president erdogan, was the guest of ukraine's president zelensky. the turkish leader said his country would remain neutral but offered to mediate with russia. meanwhile, vladimir putin hosted the president of argentina. moscow insists they have no plans to invade ukraine and the build up of russian forces is nothing more than military exercises. stay with us on bbc news. still to come: spectacle and spice — sci—fi epic dune racks up the nominations ahead of the british bafta awards. this is the moment that millions in iran have been waiting for. after his long years in exile, the first hesitant steps of ayatollah khomeini on iranian soil. south africa's white government has offered its black opponents concessions unparalleled in the history of apartheid,