This book provides a primary reference source for nuclear forensic science, including the vastly disciplinary nature of the overall endeavor for questioned weapons of mass-destruction specimens. Nothing like this exists even in the classified material. For the first time, the fundamental principles of radioforensic analysis, all pertinent protocols and procedures, computer modeling development, interpretational insights, and attribution considerations are consolidated into one convenient source. The principles and techniques so developed are then demonstrated and discussed in their applications to real-world investigations and casework conducted over the past several years.