"The purpose of the 2015 NGR [National Gang Report] is to provide a national overview of the current gang threat in the United States by collecting, analyzing, and synthesizing data obtained from law enforcement agencies across the nation. The assessments contained herein were derived from data provided by law enforcement through the '2014 FBI Safe Streets and Gang Task Force Survey', the NAGIA [National Alliance of Gang Investigators' Association] '2015 National Gang Report Survey', law enforcement reporting, and open source information. One hundred and nine respondents completed the '2014 FBI Safe Streets and Gang Task Force Survey' to create a representative sample of the five Safe Streets and Gang Task Force geographic regions. Combining data from the Safe Streets and Gang Task Forces allowed the NGIC to incorporate data from our partner agencies who participate on task forces, but did not complete the NAGIA '2015 National Gang Report Survey'. Thus, data from the '2014 FBI Safe Streets and Gang Task Force Survey' was combined with 569 responses from the four components of the NAGIA '2015 National Gang Report Survey', law enforcement reporting, and open source information to develop a holistic picture of current gang activity across the country."