Complete the following sentence: In the United States, within 100 years, four presidents<unk>Abraham Lincoln, James A. Garfield,
William McKinley and John F. Kennedy<unk>died at the hands of assassins. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Huey Long, a senator, was assassinated on September 10, 1935.<unk> Robert F. Kennedy, a senator and a presidential candidate, was also assassinated on June 6, 1968, in the United States.