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Residents have gathered in a Tennessee town to pray for healing as details emerged about a gunman who went on a rampage Thursday at the grocery store where he worked. Hollie Skaggs and Sara Wiles were strangers who happened to be running errands at the same Kroger in the Memphis suburb of Collierville. A day later, Skaggs called Wiles her guardian angel. The two clenched each other’s hands on the town hall’s steps and fought back tears during a prayer vigil Friday. The town is shaken by the attack in which a gunman killed one person, wounded 14 others and then took his own life.