Pandas to stay at National Zoo till '15
National Zoo and Chinese conservation officials have signed a deal extending the stay of Washington's two beloved giant pandas. The $2.75 million deal signed by the Smithsonian National Zoo and China Wildlife Conservation Association on Thursday at the zoo's panda exhibit allows Mei Xiang, 12, and 13-year-old Tian Tian, above, to stay until 2015. The pair arrived at the zoo in 2000. The deal was first announced Wednesday. Any cub born to the pair would now be allowed to stay four years, instead of the previous limit of two. The pair produced Tain Shan, their only cub, in 2005.