I want to know the answer to the following question:
In what year did Tito travel to the U.S. to visit Washington D.C., amist protest by anti-communist Croat, Serb and Albanian groups?
All the background I'm provided with is that "During the visit strict security was imposed in Washington, D.C. owing to protests by anti-communist Croat, Serb and Albanian groups.". Is that enough to answer the question?