In the wake of a cargo aircraft crash near Miami, Amazon has suspended its operations with 21 Air, a regional carrier woven into the fabric of the e-commerce giant's delivery promises. The decision reveals a quiet tension at the heart of modern logistics: the more a company builds its own supply chain, the more it must answer for every link in that chain. Amazon's swift response speaks to both the seriousness of the incident and the weight of accountability that comes with controlling so much of how goods move through the world.