Mamdani highlights the resilience and unity of New York City on 9/11 anniversary

Now PlayingUP NEXTHonoring the man with the red bandana who saved many lives during 9/1103:009/11 victim's son says the tragedy should not be used to 'spread hate'01:08Landmark 9/11 anniversary marked in New York, Pentagon and Shanksville ceremonies08:46FBI agent died of cancer after 9/11 Pentagon response. His widow is now telling his story04:17New moment of silence held for those lost to 9/11 health effects02:329/11 survivors are being diagnosed with cancer 25 years after the attacks05:28Trump recalls acts of heroism aboard United 93 at Pentagon 9/11 ceremony01:25Trump mourns 'beautiful souls ripped from our world' at Pentagon 9/11 ceremony01:26Watch President Trump's full remarks at Pentagon's 9/11 ceremony on 25th anniversary17:38Moment of silence held in Shanksville for victims of United Flight 9301:40Condoleezza Rice recounts her memories from the 9/11 attacks10:26Moment of silence held at Pentagon 9/11 ceremony04:12Moment of silence held when second plane struck the World Trade Center01:219/11 victims’ names read aloud at ground zero as Yo-Yo Ma performs01:37First moment of silence takes place in New York for the 25th 9/11 anniversary02:389/11 first responders push for coverage of dementia04:34Two former DHS Secretaries say department needs a 'reset' 25 years after 9/1107:18Sons of 9/11 firefighter grew up to carry on their father's legacy02:54Sole 9/11 'triple survivor' reflects on attack 25 years later01:45NBC News NOWNow PlayingMamdani highlights the resilience and unity of New York City on 9/11 anniversary01:13UP NEXTHonoring the man with the red bandana who saved many lives during 9/1103:009/11 victim's son says the tragedy should not be used to 'spread hate'01:08Landmark 9/11 anniversary marked in New York, Pentagon and Shanksville ceremonies08:46FBI agent died of cancer after 9/11 Pentagon response. His widow is now telling his story04:17New moment of silence held for those lost to 9/11 health effects02:32