The National September 11 Memorial & Museum has unveiled the design for the Memorial Museum Pavilion, by Norwegian firm Snøhetta. It is the only aboveground part of what will be a 220,000-square-foot museum and tribute to 9/11 victims. The glass-and-steel structure will be sited among a grove of oak trees at the back of the eight-acre site, where the architects see the building as the visual center of the memorial, inside and out. To engage the reflecting pools in the footprints of the Twin Towers, the south façade will tilt down toward the pools. The atrium, which will house two columns from Minoru Yamasaki's buildings, will pull light into the museum below and offer a view up to the Manhattan skyline.