For one victim, something good came out of Boston Marathon bombing

Out of evil comes something good. The evil: the April 15th bombing of the Boston Marathon. The good … this:

"As you all know, April 15th was one of the worst days of my life, suffering not only physical injuries of my own but the emotional difficulties when I learned about my friends," James "Bim" Costello wrote on his Facebook page Sunday.

Costello was near the finish line of the Boston Marathon when two bombs went off. He suffered burns and shrapnel wounds, having to pull two nails from his stomach. This is him in the moments afterwards:

"I soon wondered why and for what reason this had happened," he continued in his Facebook post. "A couple weeks later I was transferred to Spaulding Hospital, where I was able to see my friends starting to heal, but still wondered what good could come from this tragedy. A few days later I saw a nurse in passing, this would turn out to be Krista [D'Agostino], who had shared a few mutual friends, but we had never crossed paths before. After sharing a handful of conversations I realized not only how beautiful she was but also what a kind heart she had. I somehow convinced her to attend a benefit with me, which turned into a few dates, which turned into a few inseparable months."

"I now realized why I was involved in the tragedy, it was to meet my best friend, and the love of my life. Eights months later I'm happy to announce that we will spend the rest of our lives together... We got engaged last night in the middle of the beautiful French city Lyon!!!."

The engagement came during a 10-day cruise of bombing survivors and first responders.