U.S. remains `` vigilant against emerging trends and ever-changing tactics '' by smugglers . The United States has been working with the Philippines to stop illegal drugs from entering its territory through a network of surveillance planes that have flown over the South China Sea. It crashes in a Tijuana supermarket parking lot before it can reach U.S .
U.S. remains `` vigilant against emerging trends and ever-changing tactics '' by smugglers . A drone is overloaded with six pounds of synthetic crystal meth worth $ 48,000 . It crashes in a Tijuana supermarket parking lot before it can reach U.S .