Watch Matt Damon, Ben Affleck and Bono in Powerful Ebola PSA

— -- A quiet hum plays in the background as Matt Damon stares back at the camera.

The theme is waiting and what he and other stars are waiting for is action against Ebola.

"This is what waiting looks like …" flashes across the screen as another icon, Morgan Freeman, stares right back.

The public service announcement is sponsored by ONE, Bono's organization and features others like Ben Affleck, Connie Britton and Will Ferrell.

The PSA adds, "We waited too long to react."

It's pretty powerful.