Data republished by Enigma are reusable ( with attribution ) for free by journalists .
Enigma is occasionally used as a primary or corroborating source for analyses on everything from FBI aerial surveillance to house fire incidents to U.S. government shipping records .
Data republished by Enigma are reusable ( with attribution ) for free by journalists , so it is occasionally used as a primary or corroborating source for analyses on everything from FBI aerial surveillance to house fire incidents to U.S. government shipping records .