January 12, 2013 3:34 pm Delta Sigma Theta Celebrates Centennial News4’s Seth Lemon reports on the celebration of the 100th anniversary of African American sorority Delta Sigma Theta, which is being held at Howard University. Local 1:56 Dunbar students return to school after student shot through window 1:27 1 dead, 4 hurt in Suitland crash 3:27 How the pulley system helps first responders make rescues 0:24 1 killed, 23 others hurt in Maryland party bus crash 1:05 Court docs reveal moments leading up to Dunbar High School shooting that hurt teen