Tech expert Kurt Knutsson discusses how robots can milk, feed and clean cows on dairy farms, boosting efficiency and comfort. A threat to American livestock – the New World Screwworm (NWS) fly, which has been considered eradicated from the country since 1966 -- has reemerged as a potential danger following an outbreak in Mexico. The news triggered a shutdown of cattle, horse and bison imports along the southern border, as U.S. Department of Agriculture (USDA) Secretary Brooke Rollins announced in an X post on Sunday. "Due to the threat of New World Screwworm I am announcing the suspension of live cattle, horse, & bison imports through U.S. southern border ports of entry effective immediately," she wrote in the post. "The last time this devastating pest invaded America, it took 30 years for our cattle industry to recover.