Sedgwick County Commissioner Dave Unruh and his family were on vacation in a place he thought was safe and considered "a place of reverence" this afternoon — the U.S. Holocaust Memorial Museum in downtown Washington, D.C.It was 12:52 p.m. He, his wife, Karen, and two teenage grandsons were standing in line.They were on the museum's main floor, less than 30 feet from the entrance and gift shop, when an elderly gunman opened fire on the security guards and they returned fire.Unruh said neither he or any of his family members saw the shootings — but they heard them."We heard one gunshot. We weren't sure what it was. But it was followed by four or five other shots," Unruh said. "Right away, somebody said, 'Hit the floor. Hit the floor.' We did. We kind of instinctively knew what was going on. We were all pretty frightened."Unruh said he and his family stayed on the floor for a few minutes, but "it seemed longer than that."Then, Unruh said, he heard people running down the hall yelling, "Get up and run."And so, the Unruh family did and fled, along with others, through the museum's back door.2"They started evacuating the whole building, which is four stories tall," Unruh said. "You know, you go through security, metal detectors and have bags checked. This is the Holocaust museum. It's a place of history and respect, and you do not expect something like that. You think, why do they need the security? And then, somebody does something like this. It is so out of context."