Mei Xiang, like the pandas at other zoos in the United States, is always a popular attraction and interest has risen since she gave birth at the National Zoo to a cub Aug. 23. Zookeepers have yet to have a second look at the cub since its initial physical. (Associated Press)

Mei Xiang, like the pandas at other zoos in the United States, is always a popular attraction and interest has risen since she gave birth at the National Zoo to a cub Aug. 23. Zookeepers have yet to have a second look at the cub since its initial physical. (Associated Press)