Construction has begun on a border wall project despite objections from a Native American tribe. The project involves building a stretch of wall along part of the tribe's reservation. U.S. Customs and Border Protection considers the area a dangerous smuggling route and says the wall will close a security gap.

The Tohono O'odham Nation has accused the administration of trespassing, citing concerns that construction will damage sacred land. The wall segment is part of a larger effort to secure the border with steel bollard walls, vehicle barriers, and technology.

Further details on the project and its impact are available, including the scope of the $46 billion effort to install 30-foot steel walls and other security measures.