10. Galaxy C-5M
Joined the Service in 1998
Not retired: N/A
Expense: *$224.29 million
The C-5M Galaxy is an improved variant of the Galaxy, a massive transport aircraft designed by Lockheed and maintained and upgraded by Lockheed-Martin, the company’s successor. The Galaxy’s development was beset by a number of challenges, such as budgetary constraints and wing cracks in the aircraft.

C-5M Galaxy / Twitter.com / @kadonkey
Lockheed created the C-5M Super Galaxy in 1998 as a new and enhanced Galaxy. Modernised avionics, new engines, and an anticipated service life beyond 2040 characterise the C-5M. The Galaxy was initially purchased by the USAF, and since 1969, it has supported American forces in every war.
