A Nation Mourns with Newtown, CT

Newtown, Connecticut and the nation are still trying to come to grips with the unthinkable tragedy of Friday's elementary school shootings that took the lives of 20 first graders and six women. President Obama visited the grief-stricken town on Sunday and spoke to the nation, saying we as a country must do more to prevent mass shootings.

Obama said, "We can't tolerate this anymore. These tragedies must end. And to end them, we must change." Although Obama said he will use his power as president to deal with the recent spate of mass shootings, he gave no specifics. "I'll use whatever power this office holds to engage my fellow citizens in an effort at preventing more tragedies like this," he said. "Because what choice to we have?"

Obama added that our "first job" as a nation is caring for our children, but said we're failing, adding, "We are not doing enough, and we will have to change."

Aside from the vigil in Connecticut, the victims of the shooting were remembered across the country.

Here's a look at some of those who died in the attack:

• Dawn Lafferty Hochsprung was the 47-year-old principal of Sandy Hook Elementary School, a wife and mother of two daughters and three stepdaughters. Among her accomplishments was overseeing the installation of a new security system at the school.
• Mary Sherlach was the 56-year-old school psychologist, wife and mother of two daughters in their late 20s. She was shot to death in a hall way while investigating the sound of the gunshots.
• Lauren Rousseau was a 30-year-old permanent substitute teacher. She dreamed of being a teacher before she even entered kindergarten.
• Victoria Soto was a 27-year-old first grade teacher, who died while protecting her students from the shooter.
• Olivia Engel was a six-year-old girl whose family called "a precocious and completely endearing" child.
• Emilie Parker was a six-year-old girl and "the type of person who could light up a room," her father said.

Other victims include:

Rachel Davino, 29; Anne Marie Murphy, 25; Charlotte Bacon, 6; Daniel Barden, 7; Josephine Gay, 7; Ana Marquez-Greene, 6; Dylan Hockley, 6; Madeleine Hsu, 6; Catherine Hubbard, 6; Chase Kowalski, 7; Jesse Lewis, 6; James Mattioli, 6; Grace McDonnell, 7; Anne Marie Murphy, 52; Jack Pinto, 6; Noah Pozner, 6; Caroline Previdi, 6; Jessica Rekos, 6; Avielle Richman, 6; Benjamin Wheeler, 6; Allison Wyatt, 6.