French Train Attack

French Train Hero Spencer Stone Earns Promotion to Staff Sergeant

American Hero of Thwarted French Train Attack Gets Promotion 3:02

Spencer Stone, the U.S. airman hailed as a hero for helping to foil a terror attack on a French train, was promoted from Airman 1st Class to Staff Sergeant during a Friday ceremony.

Image: Spencer Stone is promoted at Travis Air Force Base
Master Sgt. Tanya Hubbard, 60th Medical Group, left, and Staff Sgt. Roberto Davila, 60th Medical Group, right, tack staff sergeant stripes on to Spencer Stone, 60th Medical Operations Squadron medical technician during a promotion ceremony at Travis Air Force Base, California, Oct. 30, 2015. Ken Wright / U.S. Air Force

The promotion officially goes into effect Sunday, Air Force officials told NBC News, and the 23-year-old earned the distinction for his leadership and courage that he showed during heroic actions in August.

Stone and two childhood friends subdued a gunman who opened fire on a Paris-bound train. Stone was stabbed with a box cutter several times during the mayhem. He, along with friends Alek Skarlatos and Anthony Sadler, received France's Legion d'Honneur for their bravery.

Related: French Train Hero Spencer Stone Released From Hospital After Stabbing

Stone, meanwhile, has recovered after he was the victim of a knifing earlier this month upon his return to his hometown of Sacramento, California.

He was stabbed three times in the torso by an assailant who attacked him during a brawl outside of a nightclub.

"I'm focused now on healing and recovering and look forward to the next part of my journey," Stone said in a previous statement.