San Diego voters in November must decide whether Miramar Marine Corps Air Station will be their choice to replace Lindbergh Field as San Diego’s regional airport. On June 6, San Diego County Regional Airport Authority’s board of directors voted 7-2 in favor of putting Miramar on the November ballot, picking it above nine other candidates as the best choice for a new airport for the city. A joint-use airport on Miramar’s 23,000-acre site would cost just under $6 billion and include two new runways. Despite a $274-million, 10-gate expansion that currently is under way, airport officials say the existing 661-acre site is unable to handle the 32 million passengers per year that the area is projected to have by 2030. The other site candidates included two other military bases and expanding Lindbergh Field. “Absolutely, there are challenges related to every site,” says Angela Shafer-Payne, vice president of strategic planning for the airport authority. The military has adamantly opposed the idea of joint-use facilities.