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 first president to fly in an airplane while in office was  Franklin Roosevelt. The first ex-president to fly  in an airplane was Theodore Roosevelt, who flew as  a pass â¦ enger in a 4-minute flight in one of the early Wright  biplanes on October 11, 1910, a year after he had left office.