The Secret Service did prevent an assassination attempt at the White House correspondents' dinner on April 28, 2026, when a California man was arrested after breaching security with intent to kill high-level officials. This represents a real security success in that specific incident. However, BBC reporting notes this is the third major security incident involving Trump in three years — so while this particular intervention worked, the broader pattern complicates any simple 'success' narrative about Secret Service readiness.