Trump officials got a lesson in the Streisand effect—whereby attempts to suppress information only circulate it further—as their outrage over ICEBlock, a free iPhone app that monitors the activity of Immigration and Customs Enforcement agents, propelled the app to the top of Apple’s App Store on Tuesday. On Monday, CNN published an article about ICEBlock, which anonymously crowdsources information about ICE agent sightings in order to create an “early warning system,” according to the app’s