President Obama attends Newtown vigil

President Barack Obama assured the grieving, shell-shocked Newtown community on Dec. 16 that "you are not alone" and vowed sternly to wield "whatever power this office holds" in a quest to prevent future mass shootings.

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President Barack Obama greets Gov. Dannel Malloy during his arrival at the start of an interfaith vigil for the victims of the Sandy Hook Elementary School shooting on Sunday, Dec. 16, 2012 at Newtown High School in Newtown, Conn. A gunman walked into Sandy Hook Elementary School Friday and opened fire, killing 26 people, including 20 children. (AP Photo/The Hartford Courant, Stephen Dunn, Pool)
President Barack Obama greets Gov. Dannel Malloy during his arrival at the start of an interfaith vigil for the victims of the Sandy Hook Elementary School shooting on Sunday, Dec. 16, 2012 at Newtown High School in Newtown, Conn. A gunman walked into Sandy Hook Elementary School Friday and opened fire, killing 26 people, including 20 children. (AP Photo/The Hartford Courant, Stephen Dunn, Pool)