On Sept. 17, another milestone will be passed for women journalists. Kristen Welker is set to become the 13th moderator of “Meet the Press,” the longest-running show on American television. For the first time, every Sunday public affairs program will be moderated or co-moderated by a woman as Welker joins Dana Bash, Shannon Bream, Margaret Brennan, Jen Psaki, and Martha Raddatz at the helms for their respective networks.