Complex sentence: As Lieutenant Commander, she became the first woman from any service, as well as the first service member from the US Coast Guard to serve as the Presidential Military Aide, where she carried the nuclear football for President Ronald Reagan for three years.
Split into simpler sentences: As Lieutenant Commander, she became the first woman from any service, as well as the first service member from the US Coast Guard to serve as the Presidential Military Aide. She carried the nuclear football for President Ronald Reagan for three years.