Prominent actors are choosing sides in the debate over the upcoming strike-authorization vote by the Screen Actors Guild, with stars Mel Gibson, Martin Sheen, Ed Harris and Ed Asner among those advocating a work stoppage and George Clooney, Tom Hanks, Matt Damon and former SAG president Melissa Gilbert among its opponents.img src="http://feeds.feedburner.com/~r/MultichannelBreakingNews/~4/490548424" height="1" width="1"/
