The American Legion and the Old Guard New England are planning a 9/11 Memorial Service at the Town Common on Saturday, Sept. 11, from 3-5 p.m. The event will commemorate the 20th anniversary of the Sept. 11 attacks and honor veterans who died during the COVID lockdown, when memorial services were unable to be held. The service will include an introductory musical performance by the Hopkinton High School band.