"Santa Fe, we stand with Uvalde": Mother of Santa Fe shooting victim speaks

"I said 'Bye Kim, I love you,' and that was the last thing I ever said to her," said Rhonda Hart, mother of 14-year-old Kimberly Vaughn, at the March for Our Lives Rally at the Texas State Capitol in downtown Austin. Kimberly was one of 10 people killed in the May 2018 mass shooting at Santa Fe High School.