Is the United States falling behind in the race for sixth-generation air superiority? New reports suggest the U.S. Air Force's F-47 prototype will not fly until 2028, while China's sixth-generation fighter programs have already entered flight testing. The delay has also fueled questions over engine development, future timelines and whether upgraded F-35s may be needed to bridge the gap. As Washington bets on a single next-generation fighter design, the competition with Beijing is entering a critical new phase. But how significant is America's latest setback?