John Parker, right, and his sister LaNora Parker, left, members of Comanche Nation in Oklahoma, arrive for a Congressional Gold Medal ceremony on Capitol Hill in Washington, Wednesday, Nov. 20, 2013, honoring Native American code talkers who used their unique languages as a means of secret communication that enemy troops could not decipher during World War II,. Their father, Simmons Parker, was an Army code talker during World War II. (AP Photo/J. Scott Applewhite) ( Code Talkers )