The run came as British Interior Minister Amber Rudd said members of the Manchester suicide bomber Salman Abedi's network were "potentially" still at large.
Eight people, including a sheriff's deputy, were killed in a shooting Saturday night in rural Mississippi, authorities said.
Police guarded the doors of Heathrow airport's Terminal 5 on Sunday, turning away travelers unless they were within 90 minutes of departure.
The launch Monday morning, the second to be reported in two days, prompted South Korea's president to call a security meeting.
The member of the Navy Leap Frogs suffered a malfunction with his parachute over Jersey City, and it failed to open properly, officials said.