The 10-day Sturgis Motorcycle Rally in South Dakota in August, which drew more than 400,000 people, has now been linked to more than 250,000 coronavirus cases, according to a study by the IZA Institute of Labor Economics. Inside a bar in Sturgis, S.D., during the rally, which Gov. Kristi Noem, a Republican, supported holding without significant public health protocols. Using anonymized cellphone data from the rally, researchers from the University of Colorado Denver, Bentley University, University of California San Diego and San Diego State University found the bikers, who were filmed and photographed in crowded bars, restaurants and outdoor venues...