NEW : Family of firefighter says fallen are remembered forever . Obama says no , describe how courageous those who died were . They pay tribute through video messages . They pass by flag - draped coffins , each with a picture of a fallen firefighter .
NEW : Brother of firefighter says fallen are heroes forever . Obama says no words describe how courageous those who died were . Families pay tribute through video messages . Relatives pass 12 flag-draped coffins , each with a picture of a fallen firefighter .