President Joe Biden and first lady Jill Biden drive past a memorial site in the town square of Uvalde set up for those killed in the school mass shooting, on their way to Robb Elementary School, Sunday, May 29, 2022, in Uvalde, Texas. (Wong Maye-E/The Associated Press)

(Wong Maye-E/The Associated Press)

U.S. President Joe Biden and his wife, Jill Biden, drive past a memorial site in the town square of Uvalde, Texas, on Sunday on their way to Robb Elementary School, where a gunman killed 19 schoolchildren and two teachers. Biden was met with chants of "do something" as he left a church service to meet privately with victims' families. He responded: "We will."