President Barack Obama mourns victims of an Arizona gunfire spree on Wednesday and urge Americans not to let a political discuss over the disaster be used as "one more juncture to turn on one another."
In a moving address to thousands of people who packed a Tucson memorial service, Obama said no one knew what encouraged a gunman to go on a run riot that killed six people and critically injured delegate Gabrielle Giffords. He warns alongside seeking "simple explanation" and cautioned Americans not to place blame.
"None of us know how to know with any conviction what might have stopped those shots from being fired, or what judgment lurk in the inner recess of a violent man's mind," Obama said.
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