PBS News Hour S46 E188 September 21, 2021

Tuesday on the NewsHour, President Joe Biden addresses world leaders at the United Nations. We talk to Bill Gates about the threats of COVID and climate change. Then, as the U.S. surpasses the number of lives lost to the 1918 flu, we reflect on the different, modern-day response to a pandemic. And, a look at how inmates sent to do their time at home during the pandemic now face a return to jail.