The US military is buying spare parts for a 50-year-old fighter jet engine

The US government is buying compressor parts for the F-100 jet engine. This engine powers older fighter jets like the F-15 and F-16, which are still in service.

The F-100 engine has been in use since the 1970s. This purchase means the US military plans to keep these older fighter jets flying for the foreseeable future. It signals a continued reliance on existing airframes rather than a rapid shift to newer, more advanced aircraft.