The database grows by 4 billion records per day, and presumably covers all traffic that crosses AT&T's network. Internal directives instructed participants never to reveal the project publicly, despite the fact that the project was portrayed as a "routine" part of DEA investigations; several investigations unrelated to drugs have been mentioned as using the data. When questioned on their participation, Verizon, Sprint, and T-Mobile refused to comment on whether they were part of the project, generating fears that "pen registers" and "trap and trace" devices are effectively irrelevant in the face of ubiquitous private-public-partnership surveillance with indefinite data retention. Information that is legally collectible according to 2014 pen trap laws includes: