To commemorate the 10th anniversary of the Sept. 11 terrorist attacks, Montgomery County officials have invited residents to join them at a memorial ceremony on Friday, Sept. 9, at 12:30 p.m. in Courthouse Square Park in Rockville.

County Executive Ike Leggett, County Council President Valerie Ervin and Rockville Mayor Phyllis Marcuccio will join members of Montgomery County’s Fire and Rescue Services, the Montgomery County Police and the City of Rockville Police in the ceremony. The program will  feature music by the Montgomery County Police Gospel Choir and the Fire and Rescue Services Pipe and Drum Corps.