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.
Franklin Roosevelt is the only U.S. president to serve more than two terms. Established by the two-term presidencies of founding fathers George Washington, Thomas Jefferson, James Madison and James Monroe, it was simply tradition to decline running for a third term.