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Keeping content on hard drives just isn't an option anymore, according to Kuglin, who points to Dropbox, Google Drive, and Pogoplug.com

"Among the fallen were also teachers, men and women who devoted their lives to helping our children."

"Everyone was just traumatized," he said.

Also, a custodian ran around, warning people there was someone with a gun, Varga said. "He said, 'Guys! Get down! Hide!'" Varga said. "So he was actually a hero." The teacher said he did not know if the custodian survived.

He said the shooter didn't utter a word.

The 20-year-old killer, carrying at least two handguns, committed suicide at the school, bringing the death toll to 28, authorities said.

NEWTOWN, Conn. (AP) — A man killed his mother at their home and then opened fire Friday inside an elementary school, massacring 26 people, including 20 children, as youngsters cowered in fear to the sound of gunshots reverberating through the building and screams echoing over the intercom.