Cooper Lutkenhaus, 16, set a world U18 record in the 800 meters with an electric stretch run at the U.S. Track & Field ...

Teen sensation Cooper Lutkenhaus stunned the track world with a blistering time that ranks among the fastest Americans ever.

The three-time Olympic gold medalist ran a personal-best time of 4:06.42 in a special event dubbed “Breaking4: Faith Kipyegon vs. the 4-Minute Mile” on Thursday at Stade Sébastien Charléty in Paris.