Delta Sigma Theta Sorority celebrates 100 years of black sisterhood in D.C.

Sara Horton and her mother, Margaret Horton, walked side by side across the Howard University campus Friday, united not only by their mother-daughter bond but in sisterhood. The Hortons are members of the Delta Sigma Theta Sorority, and they were on their way to meet more sisters -- busloads of sisters -- at Burr Gymnasium.