Korea might not get Global Hawk due to Arms Agreement:

A senior US defence export official has responded sceptically to a new request announced last week by South Korea to purchase the Northrop Grumman RQ-4 Global Hawk. But he acknowledges that such growing interest in the high-altitude, long-endurance unmanned air vehicle could drive export policy changes.

Lt Gen Jeffrey Kohler, commander of the Defense Security Cooperation Agency (DSCA), says in an interview that RQ-4 exports are unlikely due to the Missile Technology Control Regime (MTCR), a 34-nation non-proliferation pact restricting sales of space launchers, cruise missiles and UAVs that could be used to deliver weapons of mass destruction (WMD). The MTCR guidelines qualify the RQ-4 a “Category 1” weapon system, which means any export request must be reviewed with a “strong presumption of denial”. The Category 1 criteria include any UAV that can carry a 500kg (1,100lb) payload more than 550km (300nm).