Elvis, a 2-year-old beagle, enjoys a moment with Erin Curry at Iron Heart Performance Dog Center in Shawnee, Kan., Monday, Oct. 28, 2013. Elvis sniffs proteins from polar bears and is demonstrating 97% accuracy in positive identification of samples from pregnant females. The 2-year-old has been specially trained for a year by a Kansas handler who has taught dogs to sniff out everything from explosives to bed bugs. (AP Photo/Orlin Wagner)
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