The diner flourished in downtown Attleboro and the thriving business allowed J.B. to grow, which he did in the 1930's, opening a second diner. With the onset of World War II, two of J.B's four sons were sent overseas. While John Morin did not return, R. 'Russell' Morin returned with a passion to expand his father's business. Russell became the sole owner of the diner after buying out his two brothers. He immediately began to expand by catering off-premise functions and renovating the small diner into a family diner . Russell continued to expand the business buying the adjoining buildings, to increase both the kitchen and seating areas. His two sons quickly learned the trade, and after attending Cornell University and serving in the U.S Army they also returned with an interest in further expanding the family business. Russell Morin Jr. moved the catering business to the Attleboro Industrial Park in 1983, and William Morin remained with the diner. In 2010, Morin's Diner was featured on the Food networks 'Diner's, Drive-ins and Dives' and Fine Catering by Russell Morin became one of the premiere caterers in New England. This past year Morin's celebrated its 100th year in business, and with two sons actively involved, the tradition continues.