CASE CONFIRMED: Canada confirms the discovery of a second case of mad cow disease just days after the United States said it would lift ban on Canadian beef.

NO RISK: U.S. agriculture officials reaffirm support for reopening the border, saying the case poses no risk to American consumers or livestock.

THE BIG PICTURE: Canada sold more than 70 percent of its live cattle to the United States before the ban took effect 19 months ago.