In December 2006 Boeing began final assembly of the first Next-Generation 737-700ER (Extended Range). The wings, shown here, and landing gear are being joined to the 737-700ER fuselage in the Boeing manufacturing facility in Renton, WA. The airplane then joins the moving assembly line for last-stage assembly and interiors installation. The 737-700ER has the longest range capability of any 737 in regular commercial service, and is able to serve new nonstop, point-to-point routes profitably. Inspired by the Boeing Business Jet family, the passenger jet features the fuselage of the 737-700 and the wings and landing gear of the larger 737-800. The high-performance derivative can fly up to 2,145 nautical miles farther than the current 737-700. With up to nine optional auxiliary fuel tanks and optional Blended Winglets, the 737-700ER is capable of flying up to 5,510 nautical miles.