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As the 9/11 anniversary was commemorated in New York and across the country, officials continued efforts to identify remains of victims using advanced forensic technology, more than two decades after the attacks; over 1,000 victims' remains have still not been recovered. Barbara and other officials led memorial events honoring the nearly 3,000 people killed, with ceremonies held in New York City and nationwide reaffirming a pledge to never forget. Newly declassified documents added fresh context to the anniversary: the BBC reported that the CIA released 71 declassified presidential briefings showing the agency had warned of the threat of an 'explosive airplane' years before the attacks, and that Al Qaeda's plans were considered 'widely known' among extremists at the time. The disclosures have renewed scrutiny of pre-9/11 intelligence failures even as the nation marks the 25th anniversary of the attacks.