Spencer Stone

Spencer Stone, one of three Americans hailed as heroes for stopping a suspected terror attack on a French train in August, was stabbed early Thursday in the Sacramento area and is in serious condition, Air Force officials said.

(Stephen Lam / Getty Images)

Oct. 8, 2015 9:24 AM PT

Spencer Stone, one of three Americans hailed as heroes for stopping a suspected terror attack on a Paris-bound train August, was stabbed early Thursday in Sacramento.

President Barack Obama poses for a picture with U.S. Army Spc. Alek Skarlatos, left, U.S. Air Force Airman 1st Class Spencer Stone and Anthony Sadler, right, during a meeting in the Oval Office at the White House on Sept. 17.

(Mark Wilson / Getty Images)

Alek Skarlatos, left, Spencer Stone and Anthony Sadler recite the Pledge of Allegiance during a parade in Sacramento honoring their actions in overpowering a gunman on a Paris-bound train in August.

(Stephen Lam / Getty Images)

U.S. Secretary of Defense Ashton Carter presents the Airman’s Medal to Airman 1st Class Spencer Stone for his role in disarming a gunman on a Paris-bound train during a September ceremony at the Pentagon in Washington, D.C.

(Saul Loeb / AFP/Getty Images)

U.S. Air Force Airman 1st Class Spencer Stone is greeted by well-wishers after arriving at Travis Air Force Base in Fairfield, Calif., on Sept. 3.

(Rich Pedroncelli / AP)

French President Francois Hollande congratulates Spencer Stone, while Alek Skarlatos applauds, after Hollande awarded them France’s top Legion d’Honneur medal during a reception at the Elysee Palace on Aug. 24 in Paris.

(Michel Euler / AFP/Getty Images)

Anthony Sadler, left, Spencer Stone, U.S. Ambassador to France Jane D. Hartley and Alek Skarlatos arrive at the Elysee Palace on Aug. 24 in Paris. (Michel Euler / AP)