That has nothing to do with DHS. As a result of the 9/11 Commission's recommendations, the Intelligence Reform and Terrorism Prevention Act of 2004 put the Office of the Director of National Intelligence "in charge" (in an oversight capability) of the 17 major intelligence agencies we have here in the US.
For better or worse it dramatically increased intelligence sharing and cooperation, as well as effectively tearing down the walls between domestic and foreign intelligence work.
For better or worse it dramatically increased intelligence sharing and cooperation, as well as effectively tearing down the walls between domestic and foreign intelligence work.