(DAILY BEAST) -- A Monday morning meeting with campaign staffers took a terrifying turn when a gunman walked into Louisville mayoral candidate Craig Greenberg’s office and opened fire. “When we greeted him, he pulled out a gun aimed directly at me, and began shooting,” Greenberg recalled at an afternoon news conference. Advertisement - story continues below A brave staffer managed to shut the door, and the group barricaded themselves inside while the shooter fled, he said. Miraculously, no one was harmed.