Tsubasa: Reservoir Chronicle (ツバサ-RESERVoir CHRoNiCLE-, Tsubasa -Rezaboa Kuronikuru-?), is an ongoing manga series by Clamp. It is currently being serialized in Shōnen Magazine.

It was adapted into an anime series, Tsubasa Chronicle (ツバサ・クロニクル, Tsubasa Kuronikuru?), animated by Bee Train, which aired 52 episodes over two seasons during 2005 and 2006. Three OVAs (animated by Production I.G) were also released in two month successions, from November 2007 through March 2008.

As of September 1st, 2008, the English dub is being broadcast on the Funimation TV Channel in the United States. The English dub is also being broadcast by Animax across Asia under the title 'Chronicle of The Wings'.

Source: Wikipedia