"the occurrence of a marked degree of antigenic variation during passage of laboratory strains of influenza virus in eggs and cell cultures"
Nature. 1983 Jun 23-29;303(5919):706-9. Evidence for host-cell selection of influenza virus antigenic variants.

Anti-Soviet warrior puts his army on the road to peace: The Saudi businessman who recruited mujahedin now uses them for large-scale building projects in Sudan. Robert Fisk met him in Almatig

The Independent, London UK
Robert Fisk @indyvoices
Monday 6 December 1993 01:02
"Mr Bin Laden is well aware of this. 'The rubbish of the media and the embassies,' he calls it. 'I am a construction engineer and an agriculturalist. If I had training camps here in Sudan, I couldn't possibly do this job.'