The roof of the Tacoma Dome is cleaned by pressure work crews, tethered to safety lines. Wednesday March 28, 2012 in Tacoma. A six-man cleaning crew with brushes and pressure washers is helping the Tacoma Dome shine again. They're a week into a job expected to last about a month, rappelling from the 150-foot tall cupola with 30 pounds of gear strapped to their bodies. (AP Photo/The News Tribune, Dean J. Koepfler)