Serious times demand serious journalism. Watch FRONTLINE's investigative documentaries online, at any time. https://to.pbs.org/2PwlVh5 | FRONTLINE | PBS

The post-9/11 U.S.-led invasion of Afghanistan would embroil the U.S. in what would become the longest war in American history. An excerpt from FRONTLINE’s upcoming film "America After 9/11" traces the roots of the U.S. military’s failure in Afghanistan back to the aftermath of the worst terror attack on American soil. Tune in or stream the full documentary 9/7 on PBS. https://to.pbs.org/3slinCi | FRONTLINE | PBS