The B-21 Bomber was unveiled Friday. Courtesy of Northrop Grumman The Air Force unveiled its new stealth bomber in Palmdale, California on Friday. The B-21 Raider was made by Northrop Grumman and is a sixth-generation aircraft. The aircraft's first flight is projected for 2023, though the timing will depend on ground test outcomes. The B-21 Raider is the first new American bomber in more than 30 years. The B-21 Bomber was unveiled on Friday. Courtesy of Northrop Grumman The Air Force unveiled the first new US stealth bomber in decades on Friday, following years of covert development. The B-21 Raider…