The second-largest methamphetamine bust along the southwest border was announced on Sunday by the U.S. Customs and Border Protection agency. CBP officers seized more than 3,100 pounds of methamphetamine, fentanyl powder, fentanyl pills and heroin at the Otay Mesa facility on Friday.  About 9:45 a.m. Friday, a driver arrived at the cargo border crossing with a tractor-trailer shipment carrying medical…