First aired on February 4, 2003, Battle of the X-Planes looked at the development of the Joint Strike Fighter (JSF). The JSF is intended to be the next-generation military jet for the US, and Boeing and Lockheed Martin are vying to have their respective version chosen by the government. This is the companion site to the NOVA episode. Many interactive features, interviews, and articles attest to the sheer magnitude of the project. One section of the site explains the many design decisions that need to be considered for a stealth aircraft. Another section provides a first-hand account of visiting highly classified military sites and the development process of the JSF.