Planes, tractors, food and handbags featured on a list of U.S. imports worth $20 billion that the European Union said on Wednesday it could hit with tariffs in a transatlantic aircraft subsidy dispute.

The 28-nation bloc said this week it was ready to open negotiations with the United States to cut industrial duties, but has now detailed plans that could lead to a new tit-for-tat trade conflict between the two global powers.

Transatlantic tensions were inflamed again on Wednesday when Washington said it would end a ban against U.S. citizens filing lawsuits against foreign companies operating in Cuba, with EU firms seen among the targets.