25 years later, the nation is remembering one of the darkest days that forever changed the course of history. NBC Nightly News’ anchor Tom Llamas reports from New York City. Plus, a newly declassified presidential intelligence briefing shows the CIA warned former President Clinton in 1998 that Al Qaeda might use a plane in an attack on an American city. However, the warnings did not include specific information about when or how the attacks might take place. And a friendship forged amid tragedy: Stanley Praimnath and Brian Clark escaped together from the South Tower on 9/11, beating the odds to evacuate from above the floors struck by United Airlines Flight 175.