There are animals trying to cross as if their life depended on it,” researcher Erick Meza told the Society of Environmental Journalists’ conference.

Granite Construction has won a $70-million contract for seven miles of new border wall in Hidalgo County, Texas, while environmental rules will be waived to restart three projects near San Diego.

The Department of Homeland Security takes steps that it says will allow for the immediate construction of about 2.5 miles of ...