announcer: ann aquino talk by the civil rights attorney. >> states like florida and everysee one out of five black men are convicted felons. these statistics are similar in many of the states across the country, and experts suggest if this trend continues in the next 25 years, it will be one out of every three black men in america who are convicted felons. announcer: watch the boston book festival today at 2:00 p.m. eastern, and be sure to catch them live saturday and sunday, november 23 and 24th on book tv, on c-span2. announcer: on september circle on embassy row in washington, d.c., just over a mile from the white house. next on american history tv, historian alan mcpherson on his book "ghosts of sheridan circle: how a washington assassination brought pinochet's terror state to justice." mr. mcpherson gives an bus boysed talk at and poets in washington, but first, we visit sheridan circle with the author to see where the crime took place and the memorial there for the two victims. dr. mcpherson: so, we are literally at the scene of the crime. this is a memorial that was put here b