Although it didn’t make it to something more than a test, the mobile ICBM concept saw C-5 carry and drop a Minuteman missile.
In 1974, the U.S. thought that the best way to preserve its ICBMs (Inter Continental Ballistic Missiles) from Soviet nuclear strikes was to load them in C-5 Galaxy airlifters and keep them on the move.
A three-stage Minuteman, 56 feet in length and 86,000 pounds in weight, was attached to some parachutes that could drag it out of the cargo hold and then point it upward, then it was loaded into a Galaxy and air launched over the Pacific from the aircraft: a timer ignited the rocket motor and the missile flew for about 25 seconds before it cascaded into the Pacific Ocean.
This video shows the ICBM loaded into the C-5 Galaxy and air launched during the unique test. Cool.
Image credit: U.S. Air Force