"In this hypothetical example, assume that the nation or group has access to anthrax spores and also has the capability to produce the chemical agent Sarin. It determines that in order to achieve its objectives, it needs to deliver at least a 50 kg payload (including liquefied biological or chemical agent and the spray equipment) sprayed on a target at least 150 km away. This system would be adequate to disseminate the agent over a battlefield, a water supply, or a small city. An example of a complete UAV system that meets these requirements would be the Pioneer UAV. This system has a payload of 50 kg and a nominal range of 185 km, with a loiter time of nine hours. It has the necessary payload capability to carry the agent and the spraying system. It has the basic range (which could be more than doubled on a one-way mission because the return trip and extended loiter time over the target would not be required), and costs about $500,000 per vehicle (not including the payload)."