A Marine has gone viral after he dragged himself across the finish line at the Boston Marathon after both his legs "just gave up."
Here's what we know
Micah Herndon is a 31-year-old Marine veteran who served in Afghanistan. While he was deployed there, two Marines he was serving with and a British journalist were killed by an improvised explosive device. One of these men was his best friend, Matthew Ballard.
"Survivor's guilt, it's real," he told the Washington Post. "I definitely have it because I was the lead machine-gunner on that convoy and I didn't see that bomb that was buried. I live with that every day."
Herndon said that he wanted to run the marathon to honor their memories.