The Navy is moving ahead with plans to expand and modernize vast training areas used in waters off Hawaii and California, including the addition of mine warfare ranges, the service announced Tuesday.

For decades, the Tijuana River has been more than merely a geographical feature on the U.S.-Mexico border - it's also persisted as an environmental hazard. Since the 1970's, untreated sewage flows ...

A sign warns of sewage contaminated ocean waters on a beach in Coronado, California, after more than 140 million gallons of raw sewage spilled into the Tijuana River in Mexico and flowed north of the ...