Newtown, Conn. —
Another girl who was in the gym recalled hearing "like, seven loud booms."
"The gym teacher told us to go in a corner, so we all huddled and I kept hearing these booming noises," the girl, who was not identified by name, told NBC News. "We all started — well, we didn't scream. We started crying, so all the gym teachers told us to go into the office where no one could find us."
An 8-year-old boy described how a teacher saved him.
"I saw some of the bullets going past the hall that I was right next to, and then a teacher pulled me into her classroom," said the boy, who was not identified by CBSNews.com.
Robert Licata said his 6-year-old son was in class when the gunman burst in and shot the teacher. "That's when my son grabbed a bunch of his friends and ran out the door," he said. "He was very brave. He waited for his friends."
He said the shooter didn't utter a word.
"The shooting appears to have stopped," the dispatcher radioed at 9:38 a.m., according to the Post. "There is silence at this time. The school is in lockdown."
And at 9:46 a.m., an anguished voice from the school: "I've got bodies here. Need ambulances."
A half mile away, nurse Maureen Kerins was loading a broken chair into her car at about 9:45 when her cell phone rang. A friend wanted to know if her children were safe. There had been shooting at the elementary. Kerins' five kids are older, but she jumped in her car and raced to Sandy Hook. When she told police she was a nurse, they let her through.