English: North Korea Theater Missile Threats (adapted from BMDO.) Many NBC proliferators see missiles, and especially ballistic missiles, as the delivery system of choice. As of 1995, more than a dozen countries have operational ballistic missiles, and many more have missile-development programs or agreements to obtain ballistic-missile technology from others. Although most systems available to states seeking WMD capability (sometimes referred to as "proliferant states") are limited to a range of about 600 km, these ranges are increasing steadily. North Korea has flight-tested the 1,000-plus km-range No-Dong 1 and has under development a missile with a range of 3,500-plus km, the Taepo-Dong 2 (TD-2). A number of states are pursuing space-launch capabilities, which can also provide long-range military capability. Cruise missiles are also of growing importance to emerging powers. They are inexpensive compared with ballistic missiles and have increasing capabilities in terms of range, accuracy, and payload.