Aviapartner lost its operating license at Brussels Airport to an aviation company heaquartered in what Swiss city?
Aviapartner:  On June 9, 2011 Aviapartner lost its operating license at Brussels Airport to Swiss-based Swissport for a period of 7 years. Swissport: Swissport International Ltd. is a Swiss aviation services company providing airport ground and cargo handling services, headquartered in Opfikon, Switzerland.
Opfikon