The Facebook Whistleblower – A former Facebook employee says tens of thousands of pages of internal company research she has provided to the Securities and Exchange Commission and investors prove Facebook is lying to the public and investors about the effectiveness of its campaigns to eradicate hate, violence, and misinformation from its platforms. That former employee reveals her identity and speaks her mind with Scott Pelley. Unforgiven – The Public Service Loan Forgiveness Program was meant to wipe clean students' loan debts in return for a decade of public service. In theory, many military borrowers could benefit from this. But in practice, it hasn't panned out that way. Lesley Stahl talks to a group of military lawyers who had accrued law school debt and hoped for relief in exchange for their service but say they got lost in a maze of rigid rules and red tape. The Final Act – Tony Bennett has Alzheimer's disease. It's taken a toll on his memory, and the 95-year-old singer has trouble holding a conversation. But when the music comes on, the legendary crooner is able to break through the fog to find his voice again. Anderson Cooper and 60 MINUTES cameras were at a final performance he gave with Lady Gaga to capture the moment.