Question: What is the name of this American aviator, military officer, author, inventor, explorer, and environmental activist, who was one of the historical figures encountered in the book The Smithsonian Institution?
Sentence (from "The Smithsonian Institution (novel)"): Gore Vidal's 1998 novel The Smithsonian Institution is a fictional account of the adventures of "T." as he helps a group of scientists in the basement of the Smithsonian create the neutron bomb, and encounters historical figures such as President Abraham Lincoln, Charles Lindbergh, Eleanor Roosevelt and Mrs. Grover Cleveland.
Relevant evidence: Yes