Editor’s note: This week, we welcome Borough of Greencastle Mayor Ben Thomas Jr. to Local.News. Ben will provide a regular Greencastle Update column. If you are of a certain age, you certainly remember that day—where you were, your thoughts,concerns and the sacrifices made that day and in the past 21 years. “Never Forget!” Greencastle remembers September 11, 2001, when this great nation was attacked in New York City, the Pentagon and in rural Somerset County at Shanksville. The attacks occurred at 8:46 a.m., 9:03 a.m., 9:37 a.m. and 10:03 a.m.; 2,996 civilians, firefighters, EMS personnel, police officers and military personnel…