The Wall: The real costs of a barrier between the United States and Mexico
Name One State That Borders Mexico - Constitution of the United States
How San Ysidro Became Part of the City of San Diego
Earthquake shakes U.S.-Mexico border region – The Daily Wildcat
Friendship Park – San Diego, California - Atlas Obscura
Processing of migrants near the San Diego-Mexico border seems to be ramping up - The San Diego Union-Tribune
A moving border, and the history of a difficult boundary
Before the Wall: Life Along the U.S.-Mexico Border - The New York Times
Trade Flows Between the United States and Mexico: NAFTA and the Border Region
Drawing a Line: Encounters with the U.S.-Mexico Border — Incendiary Traces
Visiting the Migrant Camp at the San Diego-Tijuana Border - The New York Times
1 Dead, 1 Rescued in Waters Near US-Mexico Border Near San Diego – NBC 7 San Diego
History of San Ysidro, Mexico Insurance Services
Mexico–United States border wall - Wikipedia
US-Mexico Border Map Shows How Hard It Would Be to Build a Border Wall