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Tegucigalpa, HONDURAS:  Four unidentified members of the Mara Salvatrucha "MS-13" (juvenile gang) show their tatoos in the unit where they are kept imprisioned in the National Penitentiary in Tamara, 30km north of Tegucigalpa, 01 February 2006. AFP PHOTO/Elmer MARTINEZ  (Photo credit should read ELMER MARTINEZ/AFP/Getty Images)
Tegucigalpa, HONDURAS:  Four unidentified members of the Mara Salvatrucha "MS-13" (juvenile gang) show their tatoos in the unit where they are kept imprisioned in the National Penitentiary in Tamara, 30km north of Tegucigalpa, 01 February 2006. AFP PHOTO/Elmer MARTINEZ  (Photo credit should read ELMER MARTINEZ/AFP/Getty Images)

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MS-13: America's most dangerous street gang?

The Mara Salvatrucha gang, also known as MS-13, started in Los Angeles but has expanded throughout nearly the entire country.

MS-13: America's most dangerous street gang?

The Mara Salvatrucha gang, also known as MS-13, started in Los Angeles but has expanded throughout nearly the entire country.