The Air Force’s next aerial refueling tanker made history on Friday by making its first takeoff as a KC-46A Pegasus.The Boeing- [BA] developed aircraft took off at roughly 4:24 p.m. EDT, according to company spokesman Chick Ramey, who said the flight is slated to last four hours. The tanker was originally set to take off around 1 p.m. EDT. Takeoff was from Paine Field in Everett, Wash., while landing is set for Boeing Field in Seattle.Ramey said early Friday Boeing…