The Sandy Hook Advisory Commission will begin its grim work Thursday with an update on the police investigation into the Newtown, Conn. school massacre and presentations on the Columbine and Virginia Tech shootings. According to the Hartford Courant, 16 experts, appointed by Connecticut Gov. Dannel Malloy, will convene for the first of a series of meetings to review the Dec. 14 mass killing last year and propose improvements to current policies related to student safety, gun violence, and mental health. On Dec. 14, a lone gunman entered Sandy Hook Elementary School in Newtown and opened fire with a semi-automatic rifle,...