The Eyes of Texas are upon .... the derrieres of the 1953 Kilgore Rangerettes as they "show the flag" and quite a bit more.
Not a cancan but quite a flash.
From the Tumblr blog of denisebefore:
http://denisebefore.tumblr.com/post/64522914146/greetings-from-the-rangerettes-walker-1953
