Here’s our video report on the wall’s defacement. Due to YouTube’s (lack of) clarity, it’s hard to see. But about two-thirds of the memorial was defaced along the bottom with some unknown chemical agent that soaked into the granite surface enough to discolor it. Several panels were evidently splashed with the same substance. The Park Police originally stated that the discoloration was the result of a “cleaning accident,” but now they’re saying that it was vandalism, and they’re investigating: The unidentified substance that was found splashed on the Vietnam Veterans Memorial earlier this month was the result of vandalism, the...