WASHINGTON, DC - APRIL 18: White House Chief of Staff Susie Wiles sits in the Oval Office after U.S. President Donald Trump signed an Executive Order on April 18, 2026, in Washington, DC. The executive order directs the Food and Drug Administration to issue new guidance on the use of psychedelic drugs intended for clinical trials for U.S. veterans suffering from Post Traumatic Stress Disorder. (Photo by Tasos Katopodis/Getty Images)