 Complete the following phrase:  Hindenburg made 17 round trips across the Atlantic in 1936her first and only full year of servicewith ten trips to the United States and seven to Brazil. The flights were considered demonstrative rather than routine in schedule. The first passenger trip across the North Atlantic left Frankfurt on 6 May with 56 crew and 50 passengers, arriving in Lakehurst on 9 May. As the elevation at Rhein-Mains airfield lies at above sea level, the airship could lift more at takeoff there than she could from Friedrichshafen which was situated at . Each of the ten westward trips that season took 53 to 78 hours and eastward took 43 to 61 hours. The last eastward trip of the year left Lakehurst on October 10; the first North Atlantic trip of 1937 ended in the 