African swine fever has killed millions of China's pigs and poses a possible global threat

Bettie is among an expanded team of specially trained beagles at U.S. airports, part of a larger effort to protect the nation's $23 billion pork industry from African swine fever, which has decimated China's hog herd, the world's largest. Governments worldwide are scrambling to shore up their defenses as the disease spills over China's borders, according to Reuters.