Krzysztof Wodiczko's Abraham Lincoln: War Veteran Projection is the best public space installation in 2012, this is a must see! You can get a few minutes of a quick documentation at https://vimeo.com/53446621 but I suggest viewing the installation live. Like all of Wodiczko's work, this installation is politically charged, moving and mesmerizing. The brilliance is behind the images of 14 war veternas from Vietnam, Afganistan and Iraq, projected  onto the cold bronze statue of Abraham Lincoln. As they share their experiences and feelings of war and the aftermath, the video animates Lincoln who was captain of the Civil War.  Once again, Wodiczko manages to connect generations of people to tell their stories before the general public and what better place other then Union Square.