Columbia
Mississippi
The River Styx is the strongest and is the Underworld. :-) By, Jonathan Fowler Stephens
The strongest current in a river system is in the main flow. There is less current in eddies and backwaters.
The US has the strongest navy.
The Nile River in Egypt is the longest river in the world.
everclear
horse
Bison.
The finals
Zimbabwe
Fort Knox.
For hardness, I believe it is Hard Rock Maple. It is also the strongest by many measures.
o-sage orange