I'll start off.
I think it's always been going on. There have been increases and decreases over the years. It is reflective of a number of things in terms of gangs.
For example, there are recruitment efforts and more relationships and liaisons that you have between street gangs and organized crime groups, especially in the urban areas, as that's where more street gangs tend to evolve, and there's competition between each other, so it depends on the drug markets in those areas as well. A lot of factors come into play in terms of determining the level, scope and intensity of the violence related to street gangs.
One thing I can say—and I think I said it earlier—is that street gangs traditionally tend to be much more overt and in the open with regard to their violent activities.