2min Related Articles Several detained after fights erupt at basketball event in North Charleston Nancy Mace tells Citadel graduates to lead with “courage, discipline, and strength” in commencement speech Man bitten by shark near Charleston Harbor jetties Video: Do armed officers at schools make a difference?Since Sandy Hook, an estimated 20,000 armed officers have been employed in schools across the US. Yet, there’s no evidence it has made a difference. CNN’s Tom Foreman reports. CLICK HERE TO READ FULL ARTICLE