On September 25, 2013, the Kindle Fire HD was upgraded as the third generation Fire, priced at US$139, and the Kindle Fire HDX was introduced. The Kindle Fire HDX had an improved graphics engine, double the memory, and triple the processor speed of the previous model.
Washington, wary of the dangers posed by an individual's becoming entrenched in the presidency, created a two-term tradition that remained intact until Franklin Delano Roosevelt's third consecutive election in 1940.
Jefferson ran for president again in 1800 and won, making John Adams the country's first one-termer. After Jefferson served two terms, each of the next three Presidents was the Secretary of State at the time the previous president left office: Thomas Jefferson's last Secretary of State was John Madison, who was elected president in 1808.