Social media has been the canvas for countless stories of fear and heroics since one of the worst shootings in U.S. history on Sunday.
One from an doctor at the Orlando Regional Medical Center has been shared more than 300,000 times.
Dr. Joshua Corsa posted to Facebook that he recently purchased a pair of brand new sneakers.
In the photo he uploaded, those shoes, which were not even a week old, were soaked in blood.
Forty-nine people were killed and more than 50 others were hurt by a gunman Sunday night at the Pulse nightclub in Orlando. Corsa said he was one of the doctors who assisted.
"I don't know which were straight, which were gay, which were black, or which were Hispanic," he wrote. "What I do know is that they came to us in wave upon wave of suffering, screaming, and death. And somehow, in that chaos, doctors, nurses, technicians, police, paramedics, and others, performed super human feats of compassion and care."
Corsa said that while blood in the photo soaked through his shoes and scrubs, it also stained him forever.
"In these Rorschach patterns of red I will forever see their faces and the faces of those that gave everything they had in those dark hours," he said.
Corsa ended the post by saying that a lot of work still had to be done, some of which will never end. During it, he said he'll continue to wear the shoes until the last patient leaves his hospital.
After that, he'll keep them in his office.
"I want to see them in front of me every time I go to work," Corsa wrote. "For on June 12, after the worst of humanity reared its evil head, I saw the best of humanity of come fighting right back. I never want to forget that night."
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