This document discusses screening methods and technologies for hold baggage and cargo at airports. It outlines the threat materials that screening aims to detect, which does not include firearms, ammunition, or knives. Various screening methods are described, including canine screening, X-ray systems, explosive detection systems, hand searches, and trace detection. A multi-level screening process is outlined. The document also discusses screening capabilities for cargo, including X-ray, explosive detection systems, hand searches, metal detection, explosive trace detection, and explosive detection dogs. It notes technologies being developed and requirements for improving cargo screening. Important dates for a competition on new screening technologies are provided.