Alexis Rockman sauntered up to our meeting spot on Canal Street, the sanguine spring in his step belying the bizarre state of Broadway, deserted except for about twenty police officers wearing flak jackets and carrying machine guns. The natural history painter’s studio is located in an area of Manhattan that was closed off to all nonresidents in the aftermath of the tragedy of September 11, Black Tuesday, and he arrived exactly on time to escort me into the war zone.