The Air Force will begin to study options in fiscal year 2024 for replacing the C-5 aircraft, which has been in service for more than 50 years. The service is requesting a minimal budget to get several studies underway. The C-5 is one of the largest military transport aircraft. It was delivered to the fleet between 1969 and 1989 and had an initial service life of 30,000 flight hours. That service life is being extended through 2040 with a series...