MIRT is an acronym for the Major Incident Response Team. The team was formed following the events of 9/11. This unit is comprised of several officers from Lower Makefield Township that make up a larger Bucks County team. (The counties of Montgomery, Delaware and Chester surrounding the city of Philadelphia also have MIRT teams.) These teams are used for major incidents that could occur in one or more of these counties or in Philadelphia. The officers could respond to a terrorist-related attack, riots, national political conventions, or visits by U.S. leaders such as the President, or foreign leaders. The teams can provide additional security at such functions or as back up to the primary law enforcement agency they are assisting.