writing on facebook, "we lost our daughter and my son lost his sister. i am broken. hugs to all and hold your children tight." joaquin oliver just became a u.s. citizen a year ago. and alex schachter, a member of the marching band here. seniors meadow pollack and nick dworet were making plans for college. and tonight, remembering the teachers, the staff who put their students first. >> those heroes gave their lives for our kids. and probably helped prevent this from being a worse tragedy than it is today. >> reporter: scott beigel, who taught geography. shot in the doorway as he rushed his students into the classroom. and beloved athletic director chris hixon, running to the scene to help others to safety. and then, there's assistant football coach aaron feis. >> i heard the shots and then i saw the shooter run after mr. feis. and i saw mr. feis get shot. >> reporter: the coach using his body to shield students from the shooter. >> he was killed tragically, inhumanely. he did it protecting others, you can guarantee that, because that's who aaron feis was. >> so many of the kids here