Donald Trump is forging ahead with a new section of border wall that will threaten wildlife in a remote area where many rare animals – but very few people – roam.
Customs and Border Protection (CBP) has invited private sector companies to bid for contracts to erect nearly 25 miles of barrier on the US-Mexico border, across the unwalled San Rafael Valley south of Tucson, Arizona, one of the most biodiverse regions in the US.
