James Huberty was a gunman who opened fire on a McDonald's restaurant in San Diego, California, on July 18, 1984. Huberty killed a total of 22 people and wounded 19 others before he was shot and killed by a SWAT officer.
The incident led to police creating a special unit for hostage rescue, making the dedicated unit available for specific situations such as this massacre.http://www.cnn.com/2009/CRIME/07/23/california.mcdonalds.massacre/