New York Post:

George Steinbrenner was a Cold Warrior.
The late owner of the Yankees assisted the FBI three times in Cold War-related national-security cases involving the former Soviet Union and in connection with Middle Eastern terrorism, The Post has learned.
But his efforts were not tied to his owning the Bronx Bombers.
“It was all because of American Ship Building,” a senior FBI source said of the company that was headed by Steinbrenner. “It had nothing to do with the Yankees.”
One official familiar with Steinbrenner’s role said he provided agents with contacts and information at his disposal because of American Ship Building’s international clientele and operations.