BY STEPHEN HOBBS stephen.hobbs@gazette.com -A memorial service for Air Force Academy cadet John "Jack" Lindsey will be held Thursday, the academy said in a news release. Lindsey, a freshman, died in a skiing incident during an annual weekend gathering at a Summit County resort in late January. He planned to major in engineering, the academy said, and wanted to become an Air Force pilot.His death, caused by blunt trauma, was ruled an accident by the Summit County Coroner.