Final answer:
Daily inspections at checkpoints typically include a focus on vehicles crossing borders, with customs officers utilizing technologies like gamma ray, x-ray, and neutron-scanning devices to examine their contents without unloading.
Step-by-step explanation:
The question refers to the standard procedures for inspecting vehicles at checkpoints, specifically relating to customs and border protection duties. Vehicles that must undergo daily inspections at a checkpoint include trucks, cars, and any other modes of transport that cross a country's border. These inspections are performed to ensure the security, legality, and safety of the goods and individuals entering the nation.
Customs officers employ several advanced tools to assist them in conducting thorough inspections without needing to unload the entire vehicle. As the provided information mentions, gamma ray-, x-ray-, and neutron-scanning devices may be used to reveal the contents of the vehicles.
These technologies allow officers to detect illegal goods, such as drugs, weapons, and contraband, as well as verify legitimate cargo quickly and efficiently. The scanning also helps in abating potential threats to national security.