The European Union will start imposing a slew of retaliatory trade tariffs on U.S. goods from Friday. <br /> The move comes in response to the Trump administration's decision to slap tariffs on European steel and aluminum. <br />The EU's trade chief, Cecilia Malmstrom, said Wednesday that about three-and-a-half-billion dollars-worth of American goods will be taxed. <br />The products range from bourbon whiskey and peanut butter to Harley-Davidson motorcycles. <br />