The Tijuana River flows throughout the U.S.-Mexico border region in San Diego. / Photo by Adriana Heldiz As private contractors, which included Kiewit and Michael Baker International, began to dig ...

"The boom prevents the flow of floating trash," said Oscar Romo, executive director of Alter Terra. "It's already working." ...

Dozens of Marines unfurled coils of concertina wire — one on the ground and one slightly above — making it more difficult to climb a border wall separating Tijuana from San Diego. They worked ...

To improve mobility in the border area of Tijuana and nearby streets ... and assistance to the thousands of people who use these ports of entry between Tijuana and San Diego every day. Ideal locations ...