We've already seen a few preview clips for "The Normal Heart," the HBO film based on the Tony-Award winning play by Larry Kramer about the HIV/AIDS crisis that hits New York in the early 1980s, but a full length trailer has just arrived. Directed by Ryan Murphy ("American Horror Story," "Glee"), "The Normal Heart" stars Mark Ruffalo as a gay-American man who tries to combat the lack of knowledge regarding the disease, which is seen as a "gay epidemic" by the public after it's first discovered.