Giant panda Mei Xiang is shown after giving birth to a cub on August 23, 2013 at Smithsonian National Zoo in Washington, DC. The birth was shown live on two Internet webcams from the panda's den.A giant panda gave birth to a cub at the US National Zoo, raising hopes for a rare success after a series of false pregnancies and a death. "WE HAVE A CUB!!" the zoo announced on Twitter, after the birth was shown live on two Internet webcams from the panda's den. The tiny pinkish-white cub was born at 5:32 pm (2132 GMT), about two hours after its mother Mei Xiang's water broke, the zoo said.