A Swiss International Air Lines (SWISS) plane that made an unscheduled stop in Kazakhstan last Wednesday arrived back in Zurich on Friday morning with 221 passengers on board. The aircraft was forced to land in the central Asian country because of a medical emergency involving the co‑pilot. +Get the most important news from Switzerland in your inbox The Airbus A350 touched down at Zurich Airport at 6:45am, the airline said in a statement on Friday. The original flight was en route from the South Korean capital Seoul to Zurich on Wednesday when it was forced to divert to the Kazakh city of Almaty because of a medical emergency involving the co‑pilot. Three doctors on board provided first aid, but advised that the aircraft land so the co‑pilot could receive appropriate medical treatment, SWISS said. After landing in Almaty, the co‑pilot was taken to hospital. All passengers on Friday’s return flight had been on the original service. Six travellers chose to continue their journey from …