Workers from the Washington State Department of Agriculture managed to destroy the first nest of so-called "murder hornets" discovered in the U.S. without suffering any stings or other injuries, the agency said Monday. The nest, located in Whatcom County near the Canadian border, created concern because the Asian giant hornets are large and their sting can be lethal, especially if a person is stung numerous times. The hornets also pose a huge threat to honeybees that pollinate many crops.