It was late 2013, six months after I had run the Boston marathon – the year two men detonated two bombs near the finish line, killing three people and injuring hundreds. Back in Germany, my home country, I had been struggling with my mental health for months, but I was determined to complete another marathon and maybe make it back to Boston. I had signed up for that month’s Frankfurt marathon, but told nobody except Christina, my therapist.I went to the starting line only a couple of minutes before the race started. For the first half or so, I felt good. The sun was shining….