U.S. Readies $11 Billion in Tariffs on E.U.

An American Airlines Boeing 787 and Delta Air Lines Airbus A350 aircraft wait to take off at Beijing airport. Subsidies for airplane manufacturers are becoming a sticking point in American-European trade policy. Credit Greg Baker/Agence France-Presse — Getty Images

An American Airlines Boeing 787 and Delta Air Lines Airbus A350 aircraft wait to take off at Beijing airport. Subsidies for airplane manufacturers are becoming a sticking point in American-European trade policy. Credit Greg Baker/Agence France-Presse — Getty Images

The United States and the European Union are preparing to impose tit-for-tat tariffs on each other’s products, the latest escalation in a 14-year fight over government aid given to Boeing and European rival Airbus.