a unique specimen, a trico bezoar, a human hairball on display, in the shape of a stomach. this was surgically removed from a girl who was 12 years old. she went on to recover and lived a happy, healthy life. you can see it is formed in the shape of the stomach. also a section of a lung of a soldier who died of the influenza pandemic that killed 50 million people around the world. this is a few of the pathological specimens on display. we are now at an exhibit on forensic verification and the -- forensic identification and the science that is involved in determining a positive scientific examination on missing war dead. we start with the story of colonel charles sharp. colonel sharp was a pilot in vietnam. he was shot down rid his body was not recovered. but in the 1990's, a small piece of bone was found at a crash site. while it might have been colonel sharp's, there is no positive occasion. -- positive identification. but then eventually dna from the bone was matched with dna from love letters that colonel sharp had licked the envelope bob and --lickede envelopes the enve