Proposals for Trump’s border wall include fences, lighthouses, and nuclear waste

This week, hundreds of companies submitted proposals for President Donald Trump’s nebulous signature campaign promise, a wall between the United States and Mexico. The cost of this politically charged construction project, as well as the source of the funding, is still unsettled. And while Trump has made many specific proclamations about the wall, they aren’t consistent enough to give us an idea of its final form. The proposal request asks for both concrete-based walls and “oth