robb elementary school in uvalde. 21 lives were lost, 19 of them children. and while the tragedy has brought unimaginable pain and grief, it has also created an unbreakable bond between some of the victims mothers. you're looking at a snapshot of three friends. i would not have been able to get through this. >> without them. >> a group of have become more like sisters. >> very early on when we met, it was clear that we were very similar. >> three moms with a new bond that will forever be tightly sealed. >> it's a shared bond. >> there's no. >> not very many people that know exactly how you're feeling. >> on a journey that started here in uvalde, texas, nearly three years ago, captured in photographs, proud parents posing with their daughter during an end of school year celebration at robb elementary. a group of classmates posing for the camera. but just 30 minutes later, the same faces would become a memory. in all, 19 children and two teachers taken in an instant. >> the world continues. when mine was completely flipped around. >> in her daughter's bedroom,