19 children, 2 adults killed in mass shooting at Texas elementary school

  • An officer walks outside of Robb Elementary School in Uvalde, Texas, on Tuesday. (Allison Dinner/AFP/Getty Images/TNS)

  • A law enforcement officer tells people Tuesday afternoon, May 24, 2022, that Uvalde High School is secure after a school shooting at the nearby Robb Elementary School in Uvalde, Texas. (William Luther/San Antonio Express-News/Zuma Press/TNS)

  • A woman cries Tuesday as she leaves the Uvalde Civic Center, in Uvalde, Texas. At least 19 students and two adults were killed when a gunman opened fire at Robb Elementary School in Uvalde, according to Texas Gov. Gregg Abbott. (William Luther/San Antonio Express-News/Zuma Press/TNS)

HOUSTON — A gunman walked into a Texas school Tuesday and killed at least 21 people, including 19 children, in another mass shooting in an America that daily buries victims of gun violence amid divisive political debates over Second Amendment rights and the gaze of disbelief from the outside world.