WASHINGTON (Reuters) – Virgin Galactic inked an agreement with Boeing subsidiary Aurora Flight Sciences to build the company’s new twin-fuselage carrier plane that will ferry its next-generation spaceship toward space, the companies announced on Wednesday. Virgin Galactic, the space tourism firm founded by billionaire businessman Richard Branson, has been building a more durable, mass-producable successor to its flagship SpaceShipTwo spaceplane, which drops from the underbelly of a carrier plane before rocketing to the edge of space for a few minutes. Aurora, Boeing’s aeronautics and aviation …