Complex sentence: They set out in two Air Force "Landmasters" (giant 12-wheeled armored personnel carriers capable of climbing 60-degree inclines, and can operate in water) across "Damnation Alley" considered "the path of least resistance" between intense radiation areas.
Split into simpler sentences: They set out in two Air Force "Landmasters" (giant 12-wheeled armored personnel carriers capable of climbing 60-degree inclines and operating in water). They must cross "Damnation Alley," considered "the path of least resistance" between intense radiation areas.