Plot: Headlines for August 31, 2016; Hero or Murderer 15-Year-Old Bresha Meadows Faces Life in Prison for Killing Abusive Father; Florida State Attorney Who Oversaw Trayvon Martin & Marissa Alexander Cases Is Defeated in Primary; Sens. McCain & Rubio Beat Pro-Trump Challengers; Wasserman Schultz Survives Primary; Glenn Greenwald: Obama Has Bombed 7 Nations, But Clinton Claims He Has Not Been Militaristic Enough; A New McCarthyism: Greenwald on Clinton Camp's Attempts to Link Trump, Stein & WikiLeaks to Russia