A retired teacher known for her activism has turned 100. Opal Lee, also referred to as the "Grandmother of Juneteenth," marked this milestone on Wednesday. Her decades of advocacy are being celebrated.

A celebration was held in her honor at the National Juneteenth Museum. Further details about the celebration and Opal Lee's life are available from the source, including the location of the National Juneteenth Museum, which is in Fort Worth, Texas.