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A school bus drives past a farm while picking up students December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

Easton police officer J. Sollazzo talks to parents dropping off a child coming to school in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Eric Thayer

Newtown school district students are seen in a school bus in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own at Sandy Hook Elementary, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Shannon Stapleton

Easton police officer J. Sollazzo clasps hands with a young student returning to Hawley School, Tuesday, Dec. 18, 2012, in Newtown, Conn. 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/Jason DeCrow)

A student looks for a place to leave flowers at a makeshift memorial for the victims of the Sandy Hook Elementary School shooting at the entrance of Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

Easton police officer J. Sollazzo hugs a woman at school in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Eric Thayer

Students ride a school bus in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own at Sandy Hook Elementary, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Eric Thayer

A school bus drives on December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. DON EMMERT/AFP/Getty Images

Easton police officer J. Sollazzo waves to returning children as their bus pulls into Hawley School, Tuesday, Dec. 18, 2012, in Newtown, Conn. 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/Jason DeCrow)

A school bus stands parked on the side of a road beside a flag lowered to half mast in honor of the victims of the recent shooting in Sandy Hook Village in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Lucas Jackson

A school bus takes students to Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

Children return to school on December 18, 2012 in Newtown, Connecticut. Four days after 20 children and six adults were killed at Sandy Hook Elementary School, most students in Newtown returned to school. Children at Sandy Hook Elementary will attend a school in a neighboring town until authorities decide whether or not to reopen Sandy Hook. (Photo by John Moore/Getty Images)

A school bus drives past a field while picking up students December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

A school bus carrying students from the Newtown school district makes its way down a street in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own at Sandy Hook Elementary, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Shannon Stapleton

A school bus carrying students from the Newtown school district makes its way down a street in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own at Sandy Hook Elementary, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Shannon Stapleton

A school bus takes students to Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

A school bus takes students to Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

A Newtown school district student is seen on a school bus carrying students in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own at Sandy Hook Elementary, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Shannon Stapleton

Students ride a school bus in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own at Sandy Hook Elementary, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Eric Thayer

School buses carrying students from the Newtown school district make their way past a flag at half-mast, down Main Street in Newtown, Connecticut December 18, 2012. The schools of Newtown, which stood empty in the wake of a shooting rampage that took 26 of their own at Sandy Hook Elementary, will again ring with the sounds of students and teachers on Tuesday as the bucolic Connecticut town struggles to return to normal. REUTERS/Shannon Stapleton

A school bus turns through an intersection December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. DON EMMERT/AFP/Getty Images

A school bus takes students to Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

A school bus takes students to Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

A school bus grill is decorated with the school colors, green and white, of Sandy Hook Elementary School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

Police watch as school bus takes students to Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images

A school bus takes students to Newtown High School December 18, 2012 in Newtown, Connecticut. Students in Newtown, excluding Sandy Hook Elementary School, return to school for the first time since last Friday's shooting at Sandy Hook which took the live of 20 students and 6 adults. BRENDAN SMIALOWSKI/AFP/Getty Images