Mexico shut down schools, museums, libraries and state-run theaters across its overcrowded capital Friday in hopes of containing a swine flu outbreak that authorities say killed at least 20 people — and perhaps dozens more. World health authorities worried openly that the strange new virus could become a global epidemic.
The U.S. Centers for Disease Control and Prevention said tests show some of the Mexico victims died from the same new strain of swine flu that sickened eight people in Texas and California. Of the 14 samples tested from Mexico, seven were matches, said the CDC's acting director Dr. Richard Besser....