Intelligence used to nominate the targets for these strikes must examine the functions and then define the physical objects or people who comprise the system which is responsible for the successful operation of the function. You define the system and then attack the critical elements in order to achieve economy of force. Often these target sets are difficult to define, as these functions often represent the enemy's most valuable and therefore protected elements. The intelligence collection associated with each function will vary from target set to target set. Large, fixed infrastructure, such as associated with an electrical grid, lends itself to traditional reconnaissance and evaluation of technical analysis. Leadership targets are better defined by using human intelligence and subjective analysis. In all cases success starts with innovative intelligence products, which has not been a hallmark of United States operations. Such intelligence products must be examined through the eyes of the enemy, their values and concerns. Too often we apply judgments based on our viewpoint. One target system may serve the attainment of a number of different goals. For example, attacks on the electrical power system of the enemy may debilitate his capacity to command and control his military forces, operate vital elements of the economy and thus degrade the political support required to sustain the conflict. This same target system may be attacked a variety of ways. Most common methods would be using stealth aircraft and cruise missiles to bomb power plants and switching centers. Areas with isolated populations lend themselves to using special operations forces infiltrated to destroy an isolated power grid node for transmission of energy from one highly populated area to another. Now it is obvious that computer signals used to command the power grid are targets as intrusion into the enemy's control system provides the means to simply turn off electricity to selected areas. Attacks by all these means achieves even greater results than the sum of its parts because enemy responses to restore electrical power will be confused as elements such as computer intrusion are confused with bombing destruction.