The D Brief: El Paso, explained; Navy ships collide; Marines’ aviation plan; Estonia’s warning; And a bit more.

Border patrol agents prompted the extraordinary U.S. airspace closure over El Paso Tuesday night and into Wednesday after using a high-powered laser to shoot down what was later revealed to be a party balloon that had drifted into the sky near the U.S.-Mexico border. Initially, Transportation Secretary Sean Duffy claimed the U.S. military was responsible and said the Federal Aviation Administration lifted its 10-day closure after “a cartel drone incursion” had been “neutra