Putting aside the politics and likelihood of this wall ever happening, the proposed change to a steel wall as opposed to concrete should provide some good exposure for vanadium (as well as a bit of ongoing comical relief):
United States President Donald Trump has pledged not to bend in his demand for a wall along the southern border with Mexico, but said the barrier could be made of steel instead of concrete as a potential compromise with Democrats who are refusing to fund the project.
Source: https://www.abc.net.au/news/2019-01-07/donald-trump-holds-firm-mexico-border-wall-steel-over-concrete/10688394
