In 1997, Behring shot an endangered Kara Tau argali sheep in Kazakhstan (only 100 remained in the world at the time). Behring claimed he had permits to shoot the sheep and had Russian scientists in his hunting party; he was issued export permits two days before the enactment of a prior international decision to move Kara Tau argali to the most-endangered status. Per American law, the remains of the endangered animal could not be legally imported into the United States. Behring donated $20 million to the Smithsonian National Museum of Natural History six weeks later, offering his private collection of stuffed hunting trophies to the museum, including four rare bighorn sheep, one of which was the Kara Tau argali sheep. The Smithsonian attempted to import the remains by petitioning the Department of the Interior for an Endangered Species Act waiver, but withdrew its request after questioning and negative publicity from Representative George Miller and groups like the HSUS. Behring maintained that he had broken no laws, and had shot the animal legally while assisting Kazakh scientists. The National Museum of Natural History subsequently re-evaluated their acquisitions policies in light of the charges.