Chinese sub tracked U.S. carrier

An American aircraft carrier was closely tracked by a Chinese submarine off the coast of Japan last month, a U.S. defense official said, in the latest example of the test of wills between the two countries in the waters of the Pacific.

• • •

Mexico allows some legal marijuana

The Mexican Supreme Court on Wednesday ruled to allow a small group to use recreational marijuana legally, opening the door to nationwide legalization and a potential new front in a drug war whose violence has devastated the country.

• • •