When Delta Air Lines’ Terminal C at La Guardia Airport opens to the public on Saturday, New York will get not only a gleaming new transportation hub but also a significant artwork desired destination. “Airports are gateways to a location — tourists ought to know wherever they are,” mentioned Rick Cotton, the executive director of the Port Authority of New York and New Jersey, which operates La Guardia. “Public artwork is at the main of that component of building a new civic construction.” Huge-scale long-lasting installations by Mariam Ghani, Rashid Johnson, Aliza Nisenbaum, Virginia Overton, Ronny Quevedo and Fred Wilson — all artists living and doing work in New York…