BERLIN (Reuters) – Technical difficulties in German air traffic control were set to cause disruptions throughout European airspace on Wednesday, the operator of Frankfurt Airport, Germany’s busiest air transport hub, said. “Thus, delays in operations and flight cancellations will occur at Frankfurt Airport as well,” Fraport said on its website. It referred to “technical difficulties” at an air traffic control centre in Langen near Frankfurt, without being more specific. Air traffic control firm DFS, whose controllers monitor take-offs and landings at the 15 designated international airports in…