Summary: Mass shooting in Uvalde, Texas, timeline of the massacre and new testimonies

More details are beginning to emerge about the nineteen children and two teachers who were killed after a gunman opened fire inside a classroom at Robb Elementary School in Uvalde, Texas.

As of Thursday afternoon, at least 13 families said they had received devastating news.

• The Texas Department of Public Safety says officers saved lives at the school, despite waiting to confront the shooter.

• The husband of one of the teachers who died in a shooting at Robb Elementary School in Uvalde dies of a heart attack.

• The shooter "wasn't confronted by anyone" before entering Robb Elementary School, a Texas official says.

• The father of a student begged the officers to give him a gun and a vest to enter the school and save the children.

• This Thursday would have been the last day of the school year for Robb Elementary School.

• The annual meeting of the National Rifle Association begins Friday in Texas.

• The Uvalde attacker was inside the school for up to 1 hour before he died, authorities say.

• In the midst of their grief, family members share photos and memories of the loved ones they lost in Tuesday's massacre, from the big dreams they had to the simple things that brought them joy.