Hughes Aircraft Company becomes a major defense contractor, developing advanced radar systems, missile technology, and other military equipment. Hughes is known for his demanding management style and secrecy.

Hughes Toolco diversifies its investments, acquiring real estate, hotels, and other businesses. Hughes becomes a significant figure in Las Vegas, purchasing multiple casinos and hotels.

Hughes is forced to sell his controlling interest in TWA after a lengthy legal battle. The sale generates a substantial profit, but also marks the end of his involvement in the airline industry.

Hughes becomes increasingly reclusive and isolates himself in hotels and penthouses around the world. He exerts control over his businesses through a network of loyal aides and intermediaries, becoming a legendary and enigmatic figure.

Clifford Irving publishes a fake autobiography of Howard Hughes, which is later exposed as a hoax. The incident adds to Hughes' mystique and fuels speculation about his whereabouts and activities. McGraw-Hill eventually settles the suit Irving and his team brought against them after exposure.