The actions taken by police officers in Nashville just before a bomb went off make for “an inspiring Christmas story,” Mayor John Cooper said Monday. The six officers “rushed to danger” and “saved a lot of lives and injuries in a highly fluid situation,” Cooper said during a virtual appearance on CNN’s “New Day.” “I’m not sure they were trained exactly for this, but they were heroic, and the city really celebrates them.” Officials have described the officers as heroes after they responded to a “shots fired” emergency on Christmas Day only to find a recreational vehicle broadcasting a message that a bomb would soon go off. The officers went door to door to evacuate residents. “They went about knocking on doors and had they not made the efforts, we’d be talking about the tragedy of people and lives lost,” Nashville Police Chief John Drake told reporters on Sunday. Speaking during …