ABC News – A “very street smart” nine-year-old boy managed to pass through a security checkpoint at a Minnesota airport and hop on a flight to Las Vegas without a boarding pass, authorities said. The boy arrived alone at Minneapolis-St. Paul International Airport on Thursday morning, airport spokesman Patrick Hogan told ABC News. He was screened by TSA officials and then headed to an airport concourse, where he boarded an 11:15 a.m. flight on Delta to Sin City. The flight crew became suspicious of the nine-year-old’s travel circumstances and called the Las Vegas Metropolitan Police, who took the boy into…