South Korea has also outsourced its defense industry to produce various core components of other countries' advanced military hardware. Those hardware include modern aircraft such as F-15K fighters and AH-64 attack helicopters which will be used by Singapore, whose airframes will be built by Korea Aerospace Industries in a joint-production deal with Boeing. In other major outsourcing and joint-production deals, South Korea has jointly produced the S-300 air defense system of Russia via Samsung Group, and will facilitate the sales of Mistral class amphibious assault ships to Russia that will be produced by STX Corporation. South Korea's defense exports were $1.03 billion in 2008 and $1.17 billion in 2009.