Guidelines are released for a memorial for 9/11. “The guidelines say that competitors may create a memorial ‘of any type, shape, height or concept,’ that includes five physical elements: a recognition of each victim of the attacks; an area for quiet contemplation; a separate area for visitation by the families of the victims; a 2,500-square-foot area for the unidentified human remains collected at the trade center site; and a way to make visible the footprints of the original twin towers.”