In the 1980 film, The Final Countdown, the USS Nimitz travels through time one day prior to the Japanese attack on Pearl Harbor.
The ship’s admiral, Admiral Yelland is faced with the dilemma: 1) stay silent and let history run its course with minimal disruption, or 2) stop the attack.
Yelland chooses to stop the attack, throwing every F-14 he’s got against the oncoming zeroes. But before the future US forces can destroy the Japanese, the time vortex returns and takes the Nimitz and its planes back where they belong.
What, if anything, did the presence of the Nimitz in the past change?