Blood drives and fundraisers are ongoing in response to the Las Vegas massacre, with thousands volunteering to help, including a former Kuna High School student who knows exactly what the survivors are going through.
For 21-year-old Chris Harnum, Sunday's tragedy at the Route 91 Harvest Festival in Las Vegas brought a flood of memories.
Seven years ago, Harnum was shot in the chest by a stray bullet from a gunfight near his home in Las Vegas.
"The path of the bullet went through his lungs, destroyed his liver, destroyed his entire abdomen," said Leslie Lopez, Harnum's aunt.
He spent part of his three-year recovery with family in Idaho, attending Kuna High School.
Now, back in Vegas, he's fundraising to help survivors pay for counseling or therapy -- something he needed after surviving his own personal tragedy.
"It took me seven years to admit that I had a problem," Harnum said. "And I still struggle with a lot of anxiety, depression, PTSD, and it's probably as bad as it is for me, because I didn't take care of it."
Harnum's family says he knows just how much support the survivors of the nation's worst mass shooting in recent history will need.
"You know, the flowers stop coming and the condolence cards stop being mailed," Lopez said. "Things change and suddenly, you're just expected to heal on your own, and , a lot of times, that's just not possible. There's other mental and emotional support that you need."
Something difficult to understand, unless you've lived through it yourself.
"500 people just joined his nightmare," Lopez said. "And his heart broke for all of them."