The Concord Model Railroad Club will hold its annual train show at Everett Arena on Sunday, Aug. 23 from 10 a.m. to 3:30 p.m. There will be many operating model train layouts, including HO and O Scale, and one of Thomas the Train for the kids to watch. Vendors will be selling model trains and accessories for anyone interested in the hobby. There will be a raffle for a handmade twin-size… 0