The cornerstone for the Freedom Tower at the site of the World Trade Center.
The rebuilding of the World Trade Center officially begins, as a 20-ton piece of granite is lowered into place. The slab will serve as the cornerstone of the 1,776-foot Freedom Tower.
One side of the New York-quarried stone is etched with the dedication, "To honor and remember those who lost their lives on September 11, 2001 and as a tribute to the enduring spirit of freedom, July Fourth 2004."
The tower's design has elements that echo the Statue of Liberty. Hear Dan Blumberg of member station WNYC.