The gunfire broke out Tuesday morning at a store in Southaven, the third largest city in Mississippi.

The gunfire broke out Tuesday morning at a store in Southaven, the third largest city in Mississippi.

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A disgruntled employee kills 2 people at a Mississippi Walmart, officials say

A shooting at a Mississippi Walmart left two people dead, a police officer wounded and a community in shock. But if not for recent active shooter training, the outcome could have been far worse, police said.