reporter: 16 years later, the names are read. ralph gear hart. robert reporter: family and friends gather in shankville, pennsylvania. the military brass pay tribute outside the pentagon. we are gathered here reporter: a new york reflected for the first time as president. the living, breathing, soul of america wept with grief for every life taken on that day. reporter: even while coping with the hurricane s destruction, first responders stopped for a moment of silence in puerto rico and miami. across the country, the artifacts of the twin towers shared the city s large and small, today have special meaning. from grapevine, texas to california, free port, maine to the tiny town of rockville, minnesota. once again, courageous families reminded us of what they lost. my father, dad, this is