IBM's Watson blunders on Jeopardy on 15 Feb. 2011

After having built a considerable lead over its two human opponents, IBM's Watson computer gave an unbelievably stupid answer to the final Jeopardy question on February 15, 2011, which was in the category "US Cities." With clues about the major airport named for a World War II hero and the second airport named for a World War II battle, Watson responded with "Toronto," not normally considered a US city. Separately, Watson, and the humans, didn't know about Felipe Segundo of Spain.