Question Mark (aircraft) Question Mark (aircraft) Question Mark (""?"") was a modified Atlantic-Fokker C-2A transport airplane of the United States Army Air Corps. In 1929, commanded by Major Carl A. Spaatz, it was flown for a flight endurance record as part of an experiment with aerial refueling. "Question Mark" established new world records in aviation for sustained flight (heavier-than-air), refueled flight, sustained flight (lighter-than-air), and distance between January 1 and January 7, 1929, in a non-stop flight of more than 150 hours near Los Angeles, California. Following the record-setting demonstration, the C-2A was returned to transport duties. In 1931 more powerful engines replaced
Tourism in the Caribbean sugar, and bauxite were no longer competitively priced with the advent of free-trade policies. Encouraged by the United Nations and World Bank, many governments in the Caribbean encouraged tourism beginning in the 1950s to boost their third-world economies. The Caribbean Tourist Association was founded in 1951. Tax incentives encouraged foreign development of hotels and infrastructure, cultivated by newly formed tourism ministries. Regular non-stop international airplane flights in the 1960s made vacations to the Caribbean more affordable and increased the number of visitors. Visitors from Europe could travel there in eight hours, whereas it used to take three weeks by ship.