Eight years after the terrorist attacks of September 11th, 2001, we remember and here, take a look back, and a look at the present. This year's remembrance is emphasizing volunteerism and service, honoring the private citizens that volunteered after the attacks and encouraging the observance of the anniversary to be a day of service. Construction at Ground Zero, the site of the former twin towers, is years behind because of construction delays, design disputes and litigation involving developers, state and local officials and insurance companies. At this point, One World Trade Center (formerly the Freedom Tower), the 120-story anchor building on the site, is scheduled for a 2013 completion. ( 38 photos total