WASHINGTON (AP) — The White House has enlisted Hollywood stars including Jon Hamm of "Mad Men" and Connie Britton of "Nashville" to help fight campus sexual assault. President Barack Obama and Vice President Joe Biden are unveiling the "It's On Us" campaign Friday at a White House event. A website that went live Friday morning, ItsOnUs.org, features a public service announcement with Obama, Biden and other familiar faces telling viewers it's their responsibility to stop sexual assault.Read more on NewsOK.com