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IronKey 's founding was partially funded by the U.S. federal government , with a grant of US$ 1.4 million through the Homeland Security Research Projects Agency , and their products have been used extensively by the U.S. government in various areas .
 U.S. federal government
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 U.S. federal government