Army Sgt. Brendan Marrocco of Staten Island, N.Y., wearing a prosthetic arm, poses for a picture at the 9/11 Memorial in New York on July 4, 2012. (AP Photo/Seth Wenig)

Photo by: Seth Wenig

Army Sgt. Brendan Marrocco of Staten Island, N.Y., wearing a prosthetic arm, poses for a picture at the 9/11 Memorial in New York on July 4, 2012. (AP Photo/Seth Wenig)