linda mclean was in classroom at pine eagle charter school in the tiny town of halfway in august of that year when a masked man in a hoodie burst in with a gun , lowered it to her head and pulled the trigger .
the 56-year-old elementary school teacher had no clue it was a drill to test her ` preparedness ' or that the gun was loaded with blanks .
` you 're dead , ' the shooter said .
she believed for a several moments that she would soon die .