Stephen Sackur interviews Halima Aden, a supermodel who challenged a host of stereotypes. She is a refugee from Somalia's civil war; she's Muslim and follows a modest dress code. First shown on the BBC News Channel on Wednesday 19 FebruaryStephen Sackur interviews Halima Aden, a supermodel who challenged a host of stereotypes. She is a refugee from Somalia's civil war; she's Muslim and follows a modest dress code. First shown on the BBC News Channel on Wednesday 19 February