I catch on why a horse, why a chicken, why a this, why a that... I no catch on why a duck.

Next month the historic, if perilously fragile, Alaskan Way Viaduct will begin to be brought down. Gone will be the spectaculastic views of Puget Sound and the Olympics as you drive along the waterfront... but those views are available from a number of locations. What will truly be gone will be the sensory extravaganza of walking under the brontosaurus legs of this two-mile stretch of concrete. I thought I'd preserve a few shots of that experience. For starters: the viaduct is one of the tenuous shelters for Seattle's homeless.