Another communication lesson from 9/11 comes from something that didn’t happen. That day New York hospitals called in all available staff, to be ready to receive large numbers of patients. They worried, as did we, in our clinic just north of the twin towers, that thousands of people would need lifesaving care all at the same time. Yet there was no way to know which hospitals were full, which ones had “operating rooms” available or anything else about where to send patients, had they arrived in large numbers. Some hospitals likely would have been full up, while others nearby might have had plenty of space and available doctors and nurses standing ready. The lesson has spread across the country. Columbus, Ohio, where we work now, uses a system called “Real Time Activity Status,” (“实时动态”) which connects all the hospitals in our own Franklin County and three neighboring counties. It tells ambulance dispatchers(应急车辆的调度员) when their operating rooms are too busy and need to send patients to other hospitals. A similar system saved many lives after the 2013 Boston Marathon bombing(2013年波士顿马拉松爆炸案). By ensuring that -no matter what happens-we can communicate with each other, the emergency response community(应急救援界) keeps the memory of 9/11 alive in our own way every single day.