Ms. Tian-Ting Zhang and Ms. Zhe Li presented at the spermlab group meeting on April 24 , 2009. Part of the lab members gather together after the meeting. From left to right: Ke-Ming Yu, Da-Hui Wang, Yun-Shu Fan, Zheng Li, Xiao Sun, Xiao-Xin Ma, Tian-Ting Zhang, Wei Wang, Yu-Yang Jiang, Zhe Li, and Qian-Yi Zhao. (Photo by Dr. Wan-Xi Yang)