President Donald Trump has overturned an Obama-era requirement for intelligence officials to publish an annual report on air strikes in places like Yemen, Libya and Pakistan — a document that experts called the main means for publishing official information about CIA drone strikes.

In an executive order signed Wednesday, Trump canceled a three-year-old requirement for the director of national intelligence to release an unclassified report on May 1 every year tallying U.S. air strikes outside of specified major conflict zones, as well as estimates of militant and civilian casualties caused by those strikes.