 The German National flight attendants were later taken over by Lufthansa when it acquired Pan Am's Berlin route authorities.Over the years other local flight attendant bases outside the US included London for intra-Europe and transatlantic flying, Warsaw, Istanbul and Belgrade for intra-Europe flights, a Tel Aviv base solely staffing the daily Tel Aviv-Paris-Tel Aviv service, a Nairobi base solely staffing the Nairobi-Frankfurt-Nairobi service as well as Delhi and Bombay bases for India-Frankfurt flights.Pan Am also operated Rest and Recreation (R&R) flights during the Vietnam War.