Two people with an extensive background in escalators said they believe video released by MARTA shows the escalator's brakes malfunctioning the night nine people were injured after a Beyonce concert.

On Tuesday, two different escalator experts said the brakes potentially malfunctioned in the escalator emergency that injured 11 people following last Monday’s Beyoncé concert.

Los Angeles Unified superintendent Alberto Carvalho struck a defiant tone in his back-to-school address Tuesday, pitting the ...