Sandy Hook mourns Charleston dead

This message was posted on Facebook by Sandy Hook Promise, founded in 2013 "to protect every child from gun violence" (sandyhookpromise.org). Sandy Hook Promise is a national, non-profit organization led by several parents and spouses who lost loved ones in the mass shooting at Sandy Hook Elementary School on Dec. 14, 2012, that claimed the lives of 20 first-graders and 6 educators.