April 4, 2019 3:17 am ‘Late Night': Chris Hayes Defends Mueller Report Coverage Chris Hayes talks about reporting on climate change and defends his coverage of the Mueller report. US & World Videos 3:50 Obesity expert discusses new proposal for U.S. dietary guidelines 4:41 Parents sue over AI chatbot they say encourages children to harm themselves and others 1:32 Patriots host annual children's holiday party 2:48 Hate grocery shopping? Robots could soon do it for you 2:08 Lawrence Fire Department's ‘Station 8' uses music to teach safety to kids