He had built one of the country’s leading trauma centers in Washington, which made it possible for his team to respond quickly after the president was shot.

A 15-year-old boy could be the latest victim of subway surfing, a dangerous practice of riding on the roofs of train cars that has lured New York City youth for decades.

It was not immediately clear whether the group was demanding any significant changes to the plan for a 60-day truce, hostage-for-prisoner swaps and talks on a permanent end to the Gaza war.