When Bruce Jenner revealed to Diane Sawyer what many had already speculated — that the 1976 Olympic champion now publicly identifies as a woman — nearly 17 million people were watching.
It was a groundbreaking event for the athlete turned reality star, and for an estimated 700,000 transgender Americans.
"It's become a national teachable moment," said Mara Keisling, executive director for the Washington, D.C.-based National Center for Transgender Equality. "Somebody made us realize we weren't alone."
During the two-hour interview on ABC's "20/20," an initially nervous and teary Jenner told Sawyer, "