Monument 166
Monument 166
Monument Hill looking east
Monument Hill looking east
Monument Hill looking west
Monument Hill looking west
Buenos Aires Nat'l Wildlife Refuge
Buenos Aires Nat'l Wildlife Refuge
Organ Pipe National Monument
Organ Pipe National Monument
Trucks haul sand to build site on Aqua Prieta Wildlife Refuge
Trucks haul sand to build site on Aqua Prieta Wildlife Refuge
Buenos Aires Nat'l Wildlife Refuge
Buenos Aires Nat'l Wildlife Refuge
 Desert cleared for concrete facility
Desert cleared for concrete facility
East of Nogales
East of Nogales
Naco, AZ
Naco, AZ
Tohono O'Odam Res/ Rt 2 Sn, Mexico
Tohono O'Odam Res/ Rt 2 Sn, Mexico
Vehicle barrier
Vehicle barrier
Buenos Aires Nat'l Wildlife Refuge
Buenos Aires Nat'l Wildlife Refuge
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