President Trump’s proposed border wall has generated plenty of controversy, but his idea to switch its construction material from concrete to steel may have triggered another conflict — this ...

Durability. A concrete wall can stand up to the test of time, often lasting for a century or longer. Resistance. Do you want a retaining wall that’s fireproof, rot-proof, and rustproof?

For years, President Trump said he would build a wall out of concrete on the southern border. Now, he says it will be made of steel, not concrete. (Video: JM Rieger/The Washington Post) ...

Since then, his idea has shifted from a 1,000-mile, solid concrete wall, to a few hundred miles of "steel slats." Here's a look back at how the president's concept of a wall has evolved many times ...

Morning Mix ‘If there’s a concrete wall in front of you, go through it,’ Trump said in 2004 speech January 10, 2019 More than 6 years ago Summary ...

Lens Flare This concrete screen wall was inspired by the proportions of camera lenses By Jamie Ferello • September 7, 2018 • Architecture, Facades+, Southwest ...