Iran Diplomacy Implodes: Trump Pulls Envoys, Hormuz Stays Choked

Today's lead: Iran ceasefire talks collapse as Trump cancels the Pakistan envoy trip — Hormuz shipping remains choked and Hezbollah keeps firing despite a 3-week Lebanon truce extension. Also: Israel deploys Iron Dome to the UAE, marking the first-ever foreign deployment of the system. Plus a Hitler-costumed antisemite crashes the Boston Marathon in broad daylight, and a California gunman opens fire at the White House Correspondents' Dinner. Eight wire items and today's political calendar.