prudential. bring your challenges. b mason: we end tonight with one of the best health care plans washington has ever seen. chip reid now with pandacare. >> reporter: tian tian means more and more. a good name for him because he's the father of all three surviving giant pandas born in the national zoo. tian tian and bao bao, who are now in china, and bei bei, who is still wowing the crowds here in d.c. at 20 years old, tian tian could father more cubs so when he shows any signs of ill health, he's treated like a national treasure. today, good news-- chief veterinarian don neiffer says his sore arm is not the result