and actress carmen ejogo on the film ramon j israel easquire. glad you can join us for the show in a minute. ♪ >>> and by contributions to your pbs station from viewers like you. thank you. ♪ >>> please welcome alton miller to this program. 30 years ago on the day before thanksgiving, when chicago's first black mayor collapsed in front of him and never gained consciousness. he has a book called harold washington, the mayor, the man. and he is teaching a course on dr. king's challenging year in the windy city. good to have you on the program. >> my pleasure. >> take me back to that day, and being with the mayor. >> i started the day with a groundbreaking down on the south south side and in the car on the way back, he does complaining about some kind of congestion. got to his office. and i took out a notebook and talked about the things we didn't finish. e he is sitting there, there is a desk and i'm sitting there enter he went -- hit his face solidly on his desk. i thought that was -- everything happened in microseconds but i thought at first tha