SEATTLE-TACOMA International Airport, built by the city’s seaport in 1944 to serve civilians during the Second World War, plans to triple air cargo volume to more than 750,000 tonnes over the next 25 years, according to the port’s latest agenda. The port’s 25-year Creation Agenda aims to double the number of international flights and destinations at the airport despite a competitive air market, and troubling fuel highs denting its operating…