Amnesty International is utilizing star power to draw attention to a new exhibit on Sudan. The event, titled “Stop the Fires. Darfur.” will feature “A collection of dramatic photographs and compelling testimony documenting the current human rights crisis in Darfur, Sudan,” actress and Oscar Winner Mira Sorvino (IMDB) and “light refreshments.” DCist had heard the event would also feature an appearance by D.C. native Dave Chappelle, but Amnesty International tells us he cancelled due to…