 In 1999, during a celebration of the 30th anniversary of the Apollo 11 mission, Buzz Aldrin presented a rock brought from the Moon, which was displayed in a window in the Tribune giftstore (it could not be added to the wall as NASA owns a large majority of the Apollo Moon rocks, and this one, within that category, was merely on loan to the Tribune).The rock was removed in 2011 due to an outdated display.A new rock display is planned but has not been installed .