After 12 years of “pretrial proceedings,” and 23 years after the crime in question, prosecutors announced that a plea deal had been reached with Khalid Shaikh Mohammed and two of his accomplices, who were accused of planning the Sept. 11 attacks. When Secretary of Defense Lloyd Austin canceled the deal, some relatives of those who died on 9/11 were devastated. Guest: Terry Kay Rockefeller, founding member of September 11th Families for Peaceful Tomorrows. Want more What Next? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and across all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen. Podcast production by Elena Schwartz, Paige Osburn, Anna Phillips, Madeline Ducharme and Rob Gunther. Public.com+Public Investing Disclosure: Public Investing offers a High-Yield Cash Account where funds from this account are automatically deposited into partner banks where they earn interest and are eligible for FDIC insurance; Public Investing is not a bank. See public.com/#disclosures-main for more information. Learn more about your ad choices. Visit megaphone.fm/adchoices