Harmony, also known as Node 2, is the "utility hub" of the International Space Station. It connects the laboratory modules of the United States, Europe and Japan, as well as providing electrical power and electronic data. Sleeping cabins for four of the crew are housed here. Harmony was successfully launched into space aboard Space Shuttle flight STS-120 on 23 October 2007. After temporarily being attached to the port side of the Unity module, it was moved to its permanent location on the forward end of the Destiny module on 14 November 2007. Harmony added to the station's living volume, an increase of almost 20%, from to . Its successful installation meant that from NASA's perspective, the station was considered to be "U.S. Core Complete". Origin of name The unit formerly known as Node 2 was renamed Harmony in March 2004. The name was chosen in a competition where more than 2,200 students from 32 states participated. The Node 2 Challenge required students to learn about the space station, build a scale model, and write an essay explaining their proposed name for the module, which will serve as a central hub for science labs. The six winning classes were: Paul Cummins' 8th grade class at Browne Academy, Alexandria, Va.; Sue Wilson's 3rd grade class at Buchanan Elementary School, Baton Rouge, La.; Brigette Berry's 8th grade class at League City Intermediate School, League City, Texas; Bradley Neu's 9th grade science class at Lubbock High School, Lubbock, Texas; Russell Yocum 's 3rd grade class at West Navarre Intermediate School, Navarre, Fla.; and, David Dexheimer's students at the World Group Home School, Monona, Wisconsin. Specifications Harmony is the second of three node modules on the United States Orbital Segment (USOS). It is composed of a cylindrical, thick 2219-T851 aluminium alloy pressure shell with two endcones and is thermally insulated by a goldised Kapton blanket. It is protected from micrometeoroids by 98 panels, each made from a composite sandwich of stainless steel and 6061-T6 aluminium alloy, and a secondary barrier of Kevlar/resin. The design is based on the existing Multi-Purpose Logistics Module, as well as the European Space Agency's Columbus module (both of which have only one passive Common Berthing Mechanism [CBM]). There are six CBMs on Harmony: the aft CBM that connects it to Destiny is passive; the rest are active. Harmony is managed by NASA's Marshall Space Flight Center in Huntsville, Alabama. Its