TWIN FALLS, Idaho (KLIX) A memorial service will be held today at the Twin Falls City Band Shell to mark the 16th Anniversary of the terrorist attacks on the United States. The service will begin at 9 a.m. and will last roughly an hour. Several speakers will be present including guest Chaplain Troy Cook and Vice Mayor Suzanne Hawkins. A moment of silence, prayers, and musical numbers will also be part of the ceremony.