United States The United States is reportedly blocking a $400 million plan by South Korea to sell KAI T-50 Golden Eagle trainer jets, co-developed in 2006 with Lockheed Martin, to Uzbekistan, according to "The Korea Times". The aircraft uses Lockheed Martin technologies -- including avionics -- and as such requires permission under the U.S. Arms Export Control Act for its sale to other countries. Sources: The Korea Times UPI