Blue Stream
Blue Stream 2 was first proposed in 2002. In late August 2005, Vladimir Putin and Recep Tayyip Erdoğan discussed building a second line, and an expansion of the Blue Stream by the Samsun-Ceyhan link and by branch to southeast Europe. The promotion of construction the second line of pipeline, and extension it up through Bulgaria, Serbia and Croatia to western Hungary has activated after decision of five countries to construct the Nabucco Pipeline from Turkey to Central and Western Europe. However, this expansion was replaced by the South Stream project, which proposed laying pipeline subsea pipeline directly from Russia to Bulgaria, which in turn was later replaced by TurkStream.