Giant panda Xin Xin sleeps at the Chapultepec Zoo in Mexico City, Thursday, July 5, 2012. Xin Xin will be artificially inseminated next year in hopes of adding to the zoo's panda family Mexico City Environment Secretary Martha Delgado announced Thursday. The 22-year-old female panda is expected to be inseminated next April. Xin Xin, whose name means Hope, is the third generation born from a pair of pandas given to Mexico by China in 1975 as a symbol of friendship between the countries. (AP Photo/Eduardo Verdugo)