United Flight 93 was the final hijacked plane on September 11, 2001. It was the only jetliner not to make its intended target, the U.S. Capitol Building. Passengers and crew on the flight, who learned of the other hijackings, attempted to rush the cockpit and retake control from the terrorists. Instead, it crashed in a field in rural Pennsylvania, killing everyone on board. Their heroism will be remembered Saturday at a memorial in Shanksville, Pennsylvania. Nikole Killion reports. Each weekday morning, "CBS This Morning" co-hosts Gayle King, Anthony Mason and Tony Dokoupil deliver two hours of original reporting, breaking news and top-level newsmaker interviews in an engaging and informative format that challenges the norm in network morning news programs. Subscribe to “CBS This Morning” on YouTube: https://www.youtube.com/user/CBSThisMorning Watch CBSN live: http://cbsn.ws/1PlLpZ7c​ Download the CBS News app: http://cbsn.ws/1Xb1WC8​ Follow "CBS This Morning" on Instagram: http://bit.ly/1Q7NGnY Like "CBS This Morning" on Facebook: http://on.fb.me/1LhtdvI Follow "CBS This Morning" on Twitter: http://bit.ly/1Xj5W3p Subscribe to our newsletter: http://cbsn.ws/1RqHw7T​ Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: [email protected]