Law enforcement personnel investigate the scene at Robb Elementary School, the site of a mass shooting in Uvalde, Texas, U.S. May 25, 2022. Photo: Reuters

People gather at Robb Elementary School, the scene of a mass shooting in Uvalde, Texas, U.S., May 25, 2022. Photo: Reuters

Law enforcement personnel work at the scene of a mass shooting in Robb Elementary School, in Uvalde, Texas, U.S., May 25, 2022. Photo: Reuters

A woman offering hugs and prayers embraces a Texas Ranger outside the Ssgt Willie de Leon Civic Center, where students had been transported from Robb Elementary School after a shooting, in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

Gustavo Garcia-Siller, Archbishop of the Archdiocese of San Antonio, comforts people as they react outside the Ssgt Willie de Leon Civic Center, where students had been transported from Robb Elementary School after a shooting, in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

Gustavo Garcia-Siller, Archbishop of the Archdiocese of San Antonio, comforts people as they react outside the Ssgt Willie de Leon Civic Center, where students had been transported from Robb Elementary School after a shooting, in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

Law enforcement officers guard the scene of a shooting at Robb Elementary School in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

A child gets on a school bus as law enforcement personnel guard the scene of a shooting at Robb Elementary School in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

A view of an ambulance following a suspected shooting, in Uvalde, Texas, U.S., May 24, 2022, in this still image obtained from a social media video. Photo: Reuters

Women react outside the Ssgt Willie de Leon Civic Center, where students had been transported from Robb Elementary School after a suspected shooting, in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

A woman reacts while talking on the phone outside the Ssgt Willie de Leon Civic Center, where students had been transported from Robb Elementary School to be picked up after a suspected shooting, in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

A board with the list of classes/teachers is displayed outside the Ssgt Willie de Leon Civic Center, where students had been transported from Robb Elementary School to be picked up after a suspected shooting, in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

Law enforcement personnel run away from the scene of a suspected shooting near Robb Elementary School in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

Children get on a school bus as law enforcement personnel guard the scene of a suspected shooting near Robb Elementary School in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters

Law enforcement personnel guard the scene of a suspected shooting near Robb Elementary School in Uvalde, Texas, U.S. May 24, 2022. Photo: Reuters