veteran who has been called a hero for protecting others. >> he's in the classroom. >> reporter: in a facebook posting, mintz recalled the day that he says started out as normal. but quickly descended in to chaos. he writes, there was a bunch of yelling and gun shots going off that sounded like firecrackers. mintz who says he sat in the front of the class says everyone got up and took off. i stopped and held the door open and waited for everyone to leave safely, he writes. he then says he took direction from a counselor that kept screaming someone needed to tell the people in the library and i told her i'd do it. mintz writes that he made his way back into the classroom area where he came face-to-face with the gunman. he leaned out and started shooting as i turned toward himd. this is how he vibed t describe the shooter. he was like he was playing a video game and showed no