A school bus rolls towards a memorial for victims of the school shooting in Newtown, Conn., Tuesday, Dec. 18, 2012. Classes resume Tuesday for Newtown schools except those at Sandy Hook. Buses ferrying students to schools were festooned with large green and white ribbons on the front grills, the colors of Sandy Hook. At Newtown High School, students in sweatshirts and jackets, many wearing headphones, betrayed mixed emotions. Adam Lanza walked into Sandy Hook Elementary School in Newtown, Friday and opened fire, killing 26 people, including 20 children, before killing himself. (AP Photo/Charles Krupa) ORG XMIT: CTCK102