KUSA - The explosion in Texas marks the second time in three days that this country has experienced what's known as a mass casualty incident.
The Boston Marathon bombing injured more than a hundred.
At University of Colorado Hospital, the medical staff is well-trained in dealing with high-profile mass casualty incidents.
The head of emergency medicine, Dr. Richard Zane, came from Boston and helped shape that city's disaster response. He says the key is practice through drills for the worst case scenarios.
Dr. Zane calls the response by Boston "textbook" because it allowed paramedics and other first responders to share the load on area hospitals.
He admits no drill can prepare you for the real thing, but it does help prepare for the worst.
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