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.
The only U.S. president to serve more than two terms was Franklin Delano Roosevelt, who died in 1945 during his third term. Six years later, in 1951, Congress passes the 22nd Amendment, which limits the commander-in-chief to just two terms in office.