The Department of Homeland Security’s chief privacy officer has greenlit a Secret Service surveillance system that’s fueling law enforcement operations, according to a privacy impact assessment published last week. The Secret Service uses the tool to monitor sensitive areas, such as the White House complex and around the Capitol, for potential threats. “The Secret Service could use cameras that have pan and tilt capabilities on multi-story structures. “On the one hand, the Secret Service has a really legitimate job to do,” said Rachel Levinson-Waldman, director of the Brennan Center’s Liberty and National Security Program. The Helix privacy impact assessment is one of just a few that have been posted this year.