Thousands of migrants have crossed the U.S.-Mexico border onto Tohono O'odham Nation land since Saturday — a volume that's extremely rare in this remote Arizona region of the borderlands.

In June, the administration waived 34 environmental laws in order to expedite construction of the border wall in a remote area of Arizona's San Rafael Valley.

Construction is scheduled to begin within 60 days on a new stretch of steel-bollard border wall through the grasslands of the San Rafael Valley in Arizona, a U.S. Customs and Border Protection ...

A new stretch of border wall will soon be built through the San Rafael Valley, southeast Arizona's last major open space for cross-border wildlife migration, and a place where humans ...