The Sonoran Desert of Southern Arizona has become a vast 
killing field where thousands of people have perished since 1999. 
The vast majority of these people were undocumented migrants 
who died slow, painful deaths from dehydration and exposure.  
The United States intentionally militarized and fortified the U.S. 
- Mexican border to force tens of thousands of border crossers 
into the killing desert.  In 1996, the U.S. built a wall made from 
surplus landing mats between Nogales, Arizona and Nogales, 
Sonora (Ambos Nogales).  In 2011, they constructed an improved 
higher wall of steel bars. People of conscious organized No More  
in this desert. They put gallon jugs of water along remote desert 
trails and aid deportees in Nogales, Sonora.  My wife, Ruth Van 
Dyke and I have joined this humanitarian effort in Nogales, 
Sonora.  Our work with deportees brought me into daily contact 
with the border wall and the human cost of that wall. As an 
archaeologist, the materialization and rematerialization of the 
border intrigued me as a material process.  My almost 50 years’ 
experience crossing the border at Nogales and my interactions 
with the citizens of Ambos Nogales, migrants and deportees led 
me to ask questions about the consequences of the material 
border for people’s lives.  Before, my activism had flowed from my 
scholarship but in Nogales my scholarship sprang from my 
 
You know, when I was a boy this border wasn’t a wall it 
was more like a picket fence between neighbors.
Carlos: A lifetime resident of Ambos Nogales