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This thesis could not have been possible without the wisdom, assistance and confidence of many people. I would like to thank my faculty Advisor, Captain Joseph A. Tatman, for his insight, expertise, motivation and most of all his encouragement. Thanks must also go to my reader, Major Bruce Morlan, who provided guidance and insight through most of this study. I would also like to thank Major Bob Bonometti and Mr. Darl Evans of the U.S. Army Space Institute for providing critical information and guidance throughout this effort. To the many individuals that were willing to share their time and thoughts with me on these issues, I owe my thank3 and a commitment to offer my time and assistance to those that follow me. A special thank you must also go to my GSO classmates- from whom I have learned so much