I landed at Templehof on 10th August 1992 when i was still a PPL. The route we took from London was Biggin Hill to Cologne for refuelling then to Berlin. Next day we flew to Warsaw, then following day to Vilnius, then Riga, then Helsinki, then Stockholm, Malmo and back via Southend. Six day trip in a GA7 Cougar. Great experience and very interesting visits in all the cities as the wall had only recently come down. Mostly I seem to remember we had to fly below military airspace at around 1000 feet most of the time following airway routings. There was no AVGAS after Warsaw.