Yesterday's overcast skies were not the optimum conditions for documenting the launch of Olafur Eliasson's NYC Waterfalls; photographs from the first day tended to deemphasize the falls amid the uniformly gray background. But that's part of what's compelling about the work; it's never the same waterfall twice, being constantly affected by the light, air and your point of view. And as we suggested yesterday, while the project may seem underwhelming when you stare straight at......