(RNN) - This year marks the 16th anniversary of the 9/11 terror attacks.
Family members, survivors, first responders and politicians are marking the day with a bell ringing at Ground Zero in New York City.
Relatives of those who died will read the name of the family member they lost after a moment of silence.
President Donald Trump will be at the Pentagon memorial.
Vice President Mike Pence will be in Shanksville, PA, where passengers overtook the hijackers and crashed the plane in a field.
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