As an aside, it's fascinating that the economics of diamond mining are such that you fly fuel to the mines. They tend to be in the middle of the desert or othe

As an aside, it's fascinating that the economics of diamond mining are such that you fly fuel to the mines. They tend to be in the middle of the desert or other rough terrain, and the distances are enormous. In many cases there aren't any public roads they can (reliably) use for heavy freight, and maintaining their own would be costly. Staff are flown in anyway, so they already maintain regularly used airfields. (my dad used to be an engineer working at various African diamond mines, and my first cousin once removed still consults for them after retiring)