Group of terrified first-graders tried to escape from crazed gunman Adam Lanza – but they didn’t make it

A group of little first-graders was so terrified when crazed gunman Adam Lanza burst into their classroom that they ran from their safe hiding place only to be promptly gunned down, one of the children’s fathers recounted yesterday. “I wish my kid stayed put,” shattered father Neil Heslin said…