What prompts US Customs and Border Protection to search an inbound?
Nothing prompts a customs inspection. A ship enters U.S. waters and customs inspects the ship to assure ships personnel are in compliance with U.S. law. Inspecting cargo is a different matter. There are a whole raft of reasons why a cargo will be examined. Prior to arrival the ship's owners will submit to customs a cargo manifest. A customs officer will then review the manifest to determine which containers will be examined. It could be to collect duty like the Trump China duty ($4.3 billion a...