Part 6: ISIS Says Kayla Is Killed in Bombing

Muellers say President Obama gave sincere apology, said he'd donate to foundation for Kayla.
3:18 | 08/27/16

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Transcript for Part 6: ISIS Says Kayla Is Killed in Bombing
Make more happen. My immediate reaction is heartbreak. She was an outstanding young woman and a great spirit. And I think that spirit will live on. Reporter: You did meet with the president? Just the three of us. He was sincere and apologetic and "So sorry" and this, that, the other. He asked what he could do for you. And I said, Mr. President, I'd be remiss if I didn't give you the opportunity to support Kayla's foundation. And he said, "I will help that foundation." He says, "You won't know, it'll be an anonymous donation but I will." I'm still waiting. Reporter: There hasn't been such a donation? No. I'm still waiting for that donation, Mr. President. And you see the flag at my driveway. It's not something I take lightly, talking about our president that way. But that's what he said. Reporter: The white house confirmed to "20/20" that the president has indeed not yet made the donation he promised 18 months ago. For the muellers, the foundation they created, Kayla's hands, is so important and the president's failure to support it so disappointing, because it keeps her memory and legacy alive. She just had a heart to help children, make children happy, make them laugh. Reporter: This Prescott, Arizona, playground funded by the kiwanis club in Kayla's memory will be dedicated in a ceremony tomorrow. Kayla was one courageous voice, calling the world to speak with one voice and with our actions, to have the same courage and commitment to give all our everything for the sake of peace, justice and religious freedom. Thank you. So what I have to say to all my loved ones in Prescott is that I will always love you and it's never good-bye among friends. And that you're always learning about yourself through other people and you are always learning about life and that process never stops. The muellers -- the white house now says it will allow American families to privately pay ransom without prosecution. And the story of another young woman determined to help children. You can see it at I'm David Muir. And I'm Elizabeth'm maria: Break news, the police

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