As Of 6/18/2005:

USAF THUNDERBIRDS APPOINT FIRST FEMALE PILOT}
Finally today, for the first time in its 52-year history, the
USAF Thunderbirds has selected a female pilot to join its team.
Capt. Nicole Malachowski, of the 494th Fighter Squadron at Royal
Air Force Lakenheath, England, joins the team as the first female
demonstration
pilot on any U.S. military high performance jet team. Since 1953,
the Thunderbirds have flown for more than 310 million people
at nearly 4000 air demonstrations in all 50 states and more than
60 foreign countries.