And don't forget the Mexicans

These guys sure do love building walls, don't they?

BAGHDAD — Trying to stem the infiltration of militia fighters, American forces have begun to build a massive concrete wall that will partition Sadr City, the densely populated Shiite neighborhood in the Iraqi capital.

[From U.S. Begins Erecting Wall in Sadr City - New York Times]

If you're thinking about filming a re-make of The Graduate, forget about plastics. Go with walls.