Many doctors believe this decline in hormone levels triggers the symptoms of PMS. Changes in brain chemicals or deficiencies in certain vitamins and minerals may also play a role. Too many salty foods, alcohol, or caffeine may make symptoms worse as well.
There have been countless flights made since the invention of the airplane by the Wright Brothers in 1903. It should come as no surprise that the first commercial flight in history occurred in the United States. In fact, it occurred on January 1, 1914, three years before the United States entered the first World War.
The film trailer touted it as âthe most heroic adventure of the 20th centuryâ and thatâs exactly how Juan Terry Trippe, the founder of Pan American Airways, wanted the American public to think of flying. It was under Trippeâs guidance that Pan Am became the first commercial airline to fly across the Pacific in 1935.