When the Alfred P. Murrah Federal Building was destroyed by a domestic terrorist bomb on April 19, 1995, the entire nation watched in shock. More than ten years later, a memorial stands in silent tribute to those who were lost in the attack. The National Memorial to the Lost covers 3.3 acres and is open to visitors on a daily basis around the clock. Visitors enter the Memorial through The Gates of Time, a set of twin bronze gates that are stamped with the time the building was destroyed, 9:02 a.m. As visitors proceed further into the Memorial they will encounter a block of polished black granite reflecting pool where Fifth Street was located prior the bombing. The Reflecting Pool is meant to reflect the faces of individuals whose lives were changed when the nation was rocked by domestic terrorism on that bright spring day. Other parts of the Memorial include the Field of Empty Chairs, the Survivor’s Wall and the Survivor Tree. The Field of Empty Chairs is comprised of 168 empty bronze and glass chairs representing the number of people who were lost in the bombing while the survivor’s wall represents the hundreds of people who survived the attack.