A Boeing KC-46 again successfully refueled a second KC-46 to meet another certification milestone for fuel on-load testing, the company announced this week. "During the three-hour, forty-eight minute flight, a KC-46 successfully transferred 146,000 pounds of fuel to a second KC-46, while achieving the maximum fuel off-load rate of 1,200 gallons per minute," Boeing said in an April 4 release. "The KC-46 demonstrated the ability to safely/effectively receive fuel from three other tankers -- KC-46, KC-135 and KC-10 aircraft. As...