The 1999 shooting spree at Colorado's Columbine High School served as Grant Acord's benchmark and inspiration, Benton County District Attorney John Haroldson said.

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"It is absolutely critical that at this time of public sector austerity measures, we do all we can to ensure the now un-ring-fenced School Lunch Grant continues to be channelled towards catering and that school meals remain high quality, nutritious and above all, as affordable as possible for parents, " she said.

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Payton, Kiona, and their Northeast High School classmates received a 2012 InvenTeam grant from the Lemelson-MIT Program, which supported their development of the innovative design.

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