Giant panda Shin Shin holds bamboo while sitting inside her glass enclosure at Tokyo's Ueno Zoo on Thursday, May 30, 2013. According to officials at the zoo, the 7-year-old panda, who will be removed from public display on June 4, has shown signs that she may possibly be pregnant for a second consecutive year. Her first cub died days after becoming the first giant panda to be born at the facility in 24 years. (AP Photo/Koji Sasahara)