The extensive fifth freedom rights US carriers used to enjoy from the UK to other European countries were restricted to a few routes from London Heathrow to what used to be West Germany (including West Berlin) in the days prior to German reunification. In the early 1990s, United Airlines used to fly between Heathrow, Berlin, Hamburg and Munich (United had acquired these traffic rights along with Pan Am's transatlantic rights to/from Heathrow for US$1billion in 1990). A few years earlier, Trans World Airlines flew between London and Brussels but, unlike United, did not have traffic rights to carry local traffic between the two cities.