August 23, 2013 11:18 pm Panda Gives Birth to Cub at National Zoo News4’s Mark Segraves has the latest details in the birth of a cub at the National Zoo and the possibility of another on the way. US & World Videos 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 2:05 How ‘Love Is Blind' made Vanessa Lachey and Nick Lachey's marriage stronger 2:03 Does Shakira still believe in love following Gerard Piqué split? 1:36 O.J. Simpson's cause of death revealed 25:57 WATCH: ‘Changing Climate' highlights the Philly-area residents who are combatting climate change