Subject
- Power supply3
- War memorials3
- Construction workers2
- Earthmoving machinery2
- Flags--United States2
- Museums2
- Ordnance2
- Park rangers2
- Soldiers2
- Buildings1
- Concrete1
- Concrete--Cracking1
- Drainage pipes1
- Electric generators1
- Family1
- Fort Sumter National Monument (Agency : U.S.)1
- General Electric Company. Electrical Systems and Technology Laboratory1
- Military bases1
- Mobile cranes1
- Navies--Officers1