One World Trade Center: Building the Foundation and Base - YouTube
World Trade Center - Memorial Foundation - Flatiron
World Trade Center Memorial Foundation (New York City) - Tripadvisor
Rebuilding the World Trade Center: A Photo Timeline
Work continues on the foundations for the Freedom Tower at the World Trade Center site Thursday, March 15, 2007 in New York. Construction began last spring on the Freedom Tower, the planned
WTC Foundation Area Photograph by William Haggart - Fine Art America
One World Trade Center: Construction Progress - The Atlantic
Retaining Wall at Ground Zero Will Get Its Own Wall - The New York Times