In 1957, Frank Kameny, a rising astronomer working for the U.S. Defense Department in Hawaii, received a summons to report immediately to Washington, D.C. The Pentagon had reason to believe he was a homosexual, and after a series of humiliating interviews, Kameny, like countless gay men and women before him, was promptly dismissed from his government job. Unlike many others, though, Kameny fought back. Based on firsthand accounts, recently declassified...