SAN FRANCISCO — It was the first morning of summer, the start of fog season. But the sky above the Golden Gate Bridge remained clear and blue.
Chris Dzierman, a bridge painter and foreperson, looked to the west. Near the horizon, where water usually meets sky, a thick fog bank lurked. He wondered if and when it would roll in, as fog usually does on summer afternoons, smothering the bridge and beyond in wind and whiteness.