Outlines the tasks that should be considered at every explosion scene, focusing on those related to the identification, collection, and preservation of evidence. Consistent collection of quality evidence in bombing cases will result in more successful investigations and prosecutions. This Research Report—designed to apply to highly complex and visible cases as well as those that attract less attention and fewer resources but may be just as complex for the investigator—discusses procuring equipment and tools, prioritizing initial response efforts, evaluating the scene, documenting the scene, processing evidence at the scene, and completing and recording the scene investigation.