This combo picture of video footages provided by U.S. National Zoo shows female Giant Panda Mei Xiang during and after giving birth to a cub in this zoo in Washington D.C., capital of the United States, Sept. 17, 2012. U.S. National Zoo on Monday announced Giant Panda Mei Xiang has given birth to a cub. The National Zoo now houses Mei Xiang and Tian Tian, a pair of giant pandas on loan from China. [Xinhua]