Pentagon 9/11 Memorial (17 images)

Mazie Lawson and her daughter Courtney participate in the Pentagon's September 11th Wreath Laying Observance in Arlington, Virginia, on September 11, 2007. Mazie's daughter Cecilia Lawson Richards died in the terrorist attacks at the Pentagon on September 11, 2001. (UPI Photo/Roger L. Wollenberg)

A construction worker works at the construction site of the Pentagon Memorial Park at the Pentagon in Arlington, Virginia on September 7, 2007. The memorial is scheduled to be completed by September 11, 2008. (UPI Photo/Kevin Dietsch)

Members of the Military Honor Guard are at attention prior to the Wreath Laying Ceremony and Observance at the Pentagon in Washington on September 11, 2007. (UPI Photo/Pablo Martinez Monsivais/POOL)

WAX2001092101 - 20 SEPTEMBER 2001 - ARLINGTON, VIRGINIA, USA: A child pauses September 20, 2001, at a memorial created for the survivors and victims of the terrorist attack on the Pentagon in Arlington, Virginia. rlw/John Luck UPI