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SWAT ( special weapons & tactics for the prepared American ) is a monthly magazine dedicated to firearm s , law enforcement and other tactical-related activities in the United States with a special focus on SWAT police officers .
 United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States