1. In prior years, airspace has been limited to military and air mail services . 2. Then, in 1918, regular air mail service to Grant Park began. 3. By 1920, the Air Mail service had delivered 49 million letters. 4. Throughout this time, Upton Airport received the first air mail service in Canada. 5. The " Maiden Detroit " entered Contract Air Mail service on February 15, 1926. 6. Lindbergh used his fame to promote air mail service . 7. Blackpool and West Coast Air Services resumed the air mail service from February to October 1935. 8. They were running an air mail service from Maisoncelle to the steamer to cross the Channel. 9. The airline operated air mail services subsidised by the Australian government, linking railheads in western Queensland. 10. *1934 closely regulates the contracting of air mail services and prohibits aircraft manufacturers from owning airlines.
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