Ex-FBI agent who worked on secret 9/11 case says hijackers had a support network

Nearly 20 years after the 9/11 terror attacks, some victims’ families are still pressing the U.S. government for more information on possible ties between Saudi leaders and the attackers. CBS News spoke exclusively with a retired FBI agent who was part of a still-secret investigation into the hijackers’ network inside the U.S. Catherine Herridge reports. Each weekday morning, “CBS Mornings” co-hosts Gayle King, Tony Dokoupil and Nate Burleson bring you the latest breaking news, smart conversation and in-depth feature reporting. “CBS Mornings“ airs weekdays at 7 a.m. on CBS and 8 a.m. ET on CBSN. Subscribe to “CBS Mornings” on YouTube: Watch CBSN live: ​ Download the CBS News app: ​ Follow “CBS Mornings“ on Instagram: Like “CBS Mornings“ on Facebook: Follow “CBS Mornings“ on Twitter: https://