For decades, tankers made their way between the Middle East and California's coast. But as of this week, no more are coming. It made me pause, I think.It gave me pause for a moment because that's a significant milestone that I have not seen or faced in my 27-year career. With a halt at the straight of Hermous, the U.S. oil supply gap is here, and Californians could soon face the worst supply crisis in the U.S. But at Chevron's Southern California refinery, we saw it for ourselves. Right now, I'm literally s ...