To proceed with shipping dangerous cargo from the US, you must first identify the correct hazard classification and UN number of the goods. Then, comply with all relevant regulations such as U.S. DOT rules, IATA (for air freight), and IMDG Code (for sea freight). You must use a licensed dangerous goods logistics provider, prepare required documents like the Dangerous Goods Declaration and Safety Data Sheet, and ensure proper UN-approved packaging and labeling. Finally, the shipment is processed through customs clearance and transported under strict safety monitoring to the destination.