KARACHI (Afzal Nadeem Dogar) President Asif Ali Zardari has returned to Pakistan from London. The President used a private plane allotted the call sign Pak One (PAK1) for his 13-day visit to the UK and Europe. The aircraft is a corporate business jet owned by a leading industrial group headquartered in Multan. According to the sources, the plane was hired for the journey on the terms of the company. The plane reached Karachi from Multan on August 26. On August 27, at 4:20 pm, the aircraft took off with the call sign Pak One on its way to Vienna, the capital of the European country, Austria, with Sadd, his delegation and crew members on board. The flight stopped over at Cairo for refueling. The aircraft was parked at Vienna Airport for 4 days and departed Vienna for London on 31 September.