tonight a conversation with robert greenwald about his new documentary and first-hand -- about first-hand interviews and as well as the innocent bystanders who survive the attacks. then we will turn to a conversation with one of the great singers, dianne reeves. she went back into the recording studio last week and has just released a new project called "beautiful life." us. e glad you joined ♪ >> and by contributions to your pbs station from viewers like you. thank you. ♪ tavis: documentarian robert greenwald has never been afraid to tackle difficult subjects. his latest is called "unmanned: america's drone wars" and it challenges the use of drone warfare, which is often attacked for collateral damage. [speaking foreign language] >> you have done it again, my friend. good to have you back on. i suspect we are about to find out that what you still appreciate is being able to see project that bring humanity of the subject matter into full view. what i love about your work is you always find a way to take us right to the humanity of the character. this conversation about drone is always had