1.) Not every cargo is checked at a country border. However, customs officials have the authority to inspect any cargo that enters or exits a country. The likelihood of a cargo being inspected depends on various factors, including the type of cargo, its country of origin or destination, and the level of suspicion surrounding the shipment.
Customs officials use a risk-based approach to determine which shipments to inspect. This approach involves analyzing information about the cargo, its origin and destination, the parties involved, and other relevant factors to assess the level of risk associated with the shipment. If a shipment is considered high-risk, it is more likely to be inspected.
Some types of cargo, such as hazardous materials, weapons, and controlled substances, are subject to more extensive inspections due to their potential risks. However, even shipments that are not considered high-risk can be randomly selected for inspection.
2.) LSD (Lysergic acid diethylamide) is a chemical compound that is odorless because it lacks any volatile components that can evaporate and be detected by our olfactory system.
Chemically speaking, LSD is a relatively stable compound, meaning that it does not readily break down into other volatile substances that could produce an odor. Additionally, LSD has a very low vapor pressure, which means that it does not easily evaporate into the air and thus cannot be detected by our sense of smell.
It's worth noting that LSD is usually consumed in small quantities, typically a few micro-grams, which means that even if it did have a detectable odor, it would likely be too faint for you to perceive.