Editor's note: Anderson Cooper will broadcast from Wisconsin on Monday with the latest on the mass shooting at a Sikh temple. Watch at 8 and 10 p.m. ET.
Women and children were busy inside the Sikh temple in suburban Milwaukee, preparing for their traditional Sunday feast. Religious leaders gathered in the building's holy room, ahead of the hundreds set to arrive soon for the next service's 11:30 a.m. start.
This peace was shattered, when what authorities believe was a lone gunman opened fire inside and outside the temple in Oak Creek, Wisconsin. By the time a police officer - after his colleague had been "ambushed" and shot multiple times - returned fire, the gunman and six others were dead, Oak Creek police Chief John Edwards said.