Close observers of Robert Mueller\u2019s investigation of possible collusion between Donald Trump\u2019s 2016 presidential campaign and Russia have long wondered when, exactly, Roger Stone would be indicted. The answer came Friday, when FBI agents arrested Trump\u2019s longtime friend and advisor on seven counts, including obstruction, making false statements, and witness tampering. Garrett Graff breaks down the four key takeaways from the 24-page indictment.