Many people in Mali are at high risk of catching Ebola because the toddler who brought the disease to the country was bleeding from her nose as she traveled on a bus from Guinea, the World Health Organization warned Friday. The U.N. agency is treating the situation as an emergency since many people may have had "high-risk exposures" to the 2-year-old girl during her journey through several towns in Mali, including two hours in the capital, Bamako. The girl was traveling with her grandmother. The...