On the 20th anniversary of the 9/11 attacks, which resulted in the deaths of nearly 3,000 and injured more than 6,000, Richard revisits conversations with four 9/11 researchers and whistleblowers who offer alternative explanations for who was responsible for the attacks and how they were carried out. In hour one, Richard speaks with the late Jim Marrs on the 15th anniversary of 9/11 and materials engineer, Dr. Judy Wood, the author of Where Did the Towers Go? ?In hour two, Richard speaks with the late Philip Marshall, a former United Airlines pilot and author of The Bigbambooze: 9/11 and The War on Terror, and a U.S. Federal Agent who alleges he was part of a secret military study group that unwittingly planned the 9/11 terrorist attack 25 years before it happened.