By Hal Walter It started when Harrison was in sixth grade and the coach suggested he go out for the middle school cross-country team. I’d never considered that Harrison would be on a school sports team, but when he said he wanted to do this, I was all in. I’d also never considered this would lead me to a new avocation. As those first after-school practices wore on, it became clear that I would need to be around in case Harrison had an autistic meltdown. Before the season was out, Coach Jack Swartz was referring to me as “Coach Hal,”…