Ald. Rossana Rodriguez Sanchez (33rd Ward) posted a tweet Thursday morning to X, formerly known as Twitter, that read: “From the River to the Sea, Palestine will be Free.”

The terrorist attacks of Sept. 11, 2001 have changed the world in ways both “subtle and profound,” said DePaul University history professor Thomas Mockaitis. (WTTW News)

Saturday marks the 20th anniversary of the deadliest terrorist attack on U.S. soil. Local experts join us to discuss what we’ve learned about terrorist threats since then — and how safe we are today.