A man leaves flowers at the North pool memorial site before a commemoration ceremony for the victims of the September 11 terrorist attacks at the National September 11 Memorial, September 11, 2017. (Photo by Drew Angerer/Getty Images)
16th Annual 9/11 Commemoration Ceremony
An American flag is left at the North pool memorial site before a commemoration ceremony for the victims of the September 11 terrorist attacks at the National September 11 Memorial, September 11, 2017. (Photo by Drew Angerer/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Flowers were left at the North pool memorial site before a commemoration ceremony for the victims of the September 11 terrorist attacks at the National September 11 Memorial, September 11, 2017. (Photo by Drew Angerer/Getty Images)
16th Annual 9/11 Commemoration Ceremony
A man pauses at the North pool before a commemoration ceremony for the victims of the September 11 terrorist attacks at the National September 11 Memorial, September 11, 2017. (Photo by Drew Angerer/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Flowers were left at the North pool memorial site before a commemoration ceremony for the victims of the September 11 terrorist attacks at the National September 11 Memorial, September 11, 2017. (Photo by Drew Angerer/Getty Images)
16th Annual 9/11 Commemoration Ceremony
James Taormina, whose brother Dennis was killed in the 9/11 attacks, pauses at the memorial before a commemoration ceremony for the victims of the September 11 terrorist attacks at the National September 11 Memorial, September 11, 2017. (Photo by Drew Angerer/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Family members arrive to the 9/11 Memorial on the 16th Anniversary of the attacks of September 11 on September 11, 2017 in New York. (Photo credit BRYAN R. SMITH/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
A makeshift memorial lines the fence on the 16th Anniversary of the attacks of September 11 at the World Trade Center 9/11 Memorial on September 11, 2017. (Photo credit BRYAN R. SMITH/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
The US flag flies at half-mast at the White House before US President Donald Trump and First Lady Melania Trump observe a moment of silence on September 11, 2017, during the 16th anniversary of 9/11. (Photo credit BRENDAN SMIALOWSKI/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
A makeshift memorial lines the fence on the 16th Anniversary of the attacks of September 11 at the World Trade Center 9/11 Memorial on September 11, 2017 in New York. (Photo credit BRYAN R. SMITH/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Family members arrive to the 9/11 Memorial on the 16th Anniversary of the attacks of September 11 on September 11, 2017 in New York. (Photo credit BRYAN R. SMITH/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
A makeshift memorial lines the fence on the 16th Anniversary of the attacks of September 11 at the World Trade Center 9/11 Memorial on September 11, 2017 in New York.(Photo credit BRYAN R. SMITH/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Family members arrive to the 9/11 Memorial on the 16th Anniversary of the attacks of September 11 on September 11, 2017 in New York. (Photo credit BRYAN R. SMITH/AFP/Getty Images)
Trump, First Lady Lead Moment Of Silence On 9/11
US President Donald Trump and First Lady Melania Trump observe a moment of silence on September 11, 2017, at the White House during the 16th anniversary of 9/11.(Photo credit BRENDAN SMIALOWSKI/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Family members arrive to the 9/11 Memorial on the 16th Anniversary of the attacks of September 11 on September 11, 2017 in New York. (Photo credit BRYAN R. SMITH/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Family members arrive to the 9/11 Memorial on the 16th Anniversary of the attacks of September 11 on September 11, 2017 in New York. (Photo credit BRYAN R. SMITH/AFP/Getty Images)
Trump, First Lady Lead Moment Of Silence On 9/11
US President Donald Trump and US first lady Melania Trump participate in a moment of silence on the South Lawn of the White House during a memorial service for the 9/11 terrorist attacks September 11, 2017 in Washington, DC. (Photo credit Brendan Smialowski/AFP/Getty Images)
16th Annual 9/11 Commemoration Ceremony
Families, emergency responders arrive for the commemoration ceremony at the Sept. 11 memorial. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
Families arrive for the commemoration ceremony at the Sept. 11 memorial. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
A woman who lost her daughter, Deborah Maldonado, in the Sept. 11 terror attacks arrives for the commemoration ceremony. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
Families arrive for the commemoration ceremony at the Sept. 11 memorial. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
Families arrive for the commemoration ceremony at the Sept. 11 memorial. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
Families arrive for the commemoration ceremony at the Sept. 11 memorial. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
Families arrive for the commemoration ceremony at the Sept. 11 memorial. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
Families arrive for the commemoration ceremony at the Sept. 11 memorial. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
A man reading names at the 9/11 ceremony wears a commemorative pin. (credit: Juliet Papa/1010 WINS)
16th Annual 9/11 Commemoration Ceremony
Flags fly at half staff as the nation honors the victims of the Sept. 11 terror attacks. (credit: Juliet Papa/1010 WINS)
16th Annual Commemoration Ceremony Held At WTC Site For 9/11 Terror Victims
(L to R) Sen. Chuck Schumer (D-NY) speaks with New York governor Andrew Cuomo during a commemoration ceremony for the victims of the September 11 terrorist attacks at the National September 11 Memorial, September 11, 2017 in New York City. In New York City and throughout the United States, the country is marking the 16th anniversary of the September 11 terrorist attacks. (Photo by Drew Angerer/Getty Images)
15th Annual Commemoration Ceremony Held At WTC Site For 9/11 Terror Victims
The 'Tribute in Light' rises above the skyline of Lower Manhattan as seen from the Brooklyn Heights Promenade, September 11, 2017 in New York City. In New York City and throughout the United States, the country is marking the 16th anniversary of the September 11 terrorist attacks. (Photo by Drew Angerer/Getty Images)
15th Annual Commemoration Ceremony Held At WTC Site For 9/11 Terror Victims
The 'Tribute in Light' rises above the skyline of Lower Manhattan as seen from the Brooklyn Bridge, September 11, 2017 in New York City. In New York City and throughout the United States, the country is marking the 16th anniversary of the September 11 terrorist attacks. (Photo by Drew Angerer/Getty Images)
15th Annual Commemoration Ceremony Held At WTC Site For 9/11 Terror Victims
The 'Tribute in Light' rises above the skyline of Lower Manhattan as seen from the Brooklyn Heights Promenade, September 11, 2017 in New York City. In New York City and throughout the United States, the country is marking the 16th anniversary of the September 11 terrorist attacks. (Photo by Drew Angerer/Getty Images)
15th Annual Commemoration Ceremony Held At WTC Site For 9/11 Terror Victims
The 'Tribute in Light' rises above the skyline of Lower Manhattan as seen from the Brooklyn Bridge, September 11, 2017 in New York City. In New York City and throughout the United States, the country is marking the 16th anniversary of the September 11 terrorist attacks. (Photo by Drew Angerer/Getty Images)
