Identify three of the major organized crime groups of different nationalities that currently operate in the U. and discuss the type of crime in which...

Identify three of the major organized crime groups of different nationalities that currently operate in the U.S. and discuss the type of crime in which they tend to be most involved.

If the answer could please be between 300 to 500 words, in essay style format, and please cite any sources used. Thank you!