A Minnesota school district where two students were killed in a 2003 shooting unveiled a new device Tuesday aimed at adding a last-ditch layer of safety for teachers and students: bulletproof whiteboards.

The Rocori School District has acquired nearly 200 of the whiteboards, made of a material touted by its manufacturer as stronger than that in police-issue bulletproof vests. The 18-by-20-inch whiteboards can be used by teachers for instruction and used as a shield in an emergency.

Police Chief Phil Jones demonstrated the whiteboards Tuesday in a school gym by leveling a karate kick at one, whacking it with a police baton and stabbing it with a knife — a

Source: The Associated Press/Fox News