Final answer:
Between 2000 and 2013, there were around 160 active shooters in the United States. Mass shootings, occurring in various settings, have become a growing concern. The accessibility of firearms is debated as a key factor in these incidents.
Step-by-step explanation:
Between 2000 and 2013, there were approximately 160 active shooters in the United States. These incidents occurred in various settings, including schools, places of worship, and malls. Mass shootings have become a growing concern, with the accessibility of firearms being a key issue. Advocates for stricter gun control argue that there is a clear relationship between access to guns and mass shootings, while gun rights advocates disagree, claiming that access to guns is incidental.