9/11 memorial ceremonies honour victims on 17th anniversary of attacks

Click to play video: '9/11 victims honoured in New York City during 17th anniversary'
9/11 victims honoured in New York City during 17th anniversary
WATCH: The beginning of 9/11 ceremonies in New York City included the singing of the American national anthem along with a moment of silence.  – Sep 11, 2018

Americans are commemorating 9/11 with sombre tributes, volunteer projects and a new monument to victims, after a year when two attacks demonstrated the enduring threat of terrorism in the nation’s biggest city.

Thousands of 9/11 victims’ relatives, survivors, rescuers were at Tuesday’s anniversary ceremony at the World Trade Center, while U.S. President Donald Trump and Vice President Mike Pence headed to the two other places where hijacked planes crashed on Sept. 11, 2001, in the deadliest terror attack on American soil.

READ MORE: New York City’s WTC subway station re-opens for first time since 9/11 attacks

WATCH: Family members address love ones lost in the 9/11 attacks in New York City on the 17th anniversary.

Click to play video: 'Families of 9/11 victims read letters to the loved ones'
Families of 9/11 victims read letters to the loved ones

The president and first lady Melania Trump joined an observance at the Sept. 11 memorial in a field near Shanksville, Pennsylvania, where a new “Tower of Voices” was dedicated Saturday. Pence is attending a ceremony at the Pentagon. Trump, a Republican and native New Yorker, took the occasion of last year’s anniversary to issue a stern warning to extremists that “America cannot be intimidated.”

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Nearly 3,000 people died in the attacks on 9/11, when international terrorism hit home in a way it previously hadn’t for many Americans. Sept. 11 still shapes American policy, politics and everyday experiences in places from airports to office buildings, even if it’s less of a constant presence in the public consciousness after 17 years.

WATCH: 9/11 victims families read letter to their parents

Click to play video: '9/11 victims families read letter to their parents'
9/11 victims families read letter to their parents

A stark reminder came not long after last year’s anniversary: A truck mowed down people, killing eight, on a bike path within a few blocks of the World Trade Center on Halloween.

In December, a would-be suicide bomber set off a pipe bomb in a subway passageway near Times Square, authorities said. They said suspects in both attacks were inspired by the Islamic State extremist group.

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The 9/11 commemorations are by now familiar rituals, centred on reading the names of the dead. But each year at ground zero, victims’ relatives infuse the ceremony with personal messages of remembrance, concern and inspiration.

“What I can say today is that I don’t live my life in complacency,” Debra Epps said last year as she remembered her brother, Christopher Epps. “I stand in solidarity that this world will make a change for the better.”

Hours after the ceremony, two powerful light beams will soar into the night sky from lower Manhattan in the annual “Tribute in Light.”

WATCH: A playing of the trumpets signaled the end of the 9/11 ceremony in New York on the 17th anniversary of the Sep. 11 attacks. 

Click to play video: 'Trumpets signal end of 9/11 anniversary ceremony in New York City'
Trumpets signal end of 9/11 anniversary ceremony in New York City

READ MORE: New documentary looks at real people behind hit musical ‘Come From Away’

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This year’s anniversary comes as a heated midterm election cycle kicks into high gear. But there have long been some efforts to separate the solemn anniversary from politics.

The group 9/11 Day, which promotes volunteering on an anniversary that was declared a national day of service in 2009, routinely asks candidates not to campaign or run political ads for the day. Organizers of the ground zero ceremony allow politicians to attend, but they’ve been barred since 2011 from reading names or delivering remarks.

Memorials to 9/11 continue to grow at Shanksville, where the Tower of Voices will eventually include a wind chime for each of the 40 people killed there, and ground zero, where work is to begin soon on a pathway honouring rescue and recovery workers.

WATCH: 9/11 anniversary — Trump vows to do ‘whatever it takes’ to keep Americans safe

Click to play video: '9/11 anniversary: Trump vows to do ‘whatever it takes’ to keep Americans safe'
9/11 anniversary: Trump vows to do ‘whatever it takes’ to keep Americans safe

It will serve as a way to honour those who became sick or died from exposure to toxins released when the Trade Center’s twin towers collapsed. Researchers have documented elevated rates of respiratory ailments, post-traumatic stress disorder and other illnesses among people who spent time in the rubble.

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About 38,500 people have applied to a compensation fund, and over $3.9 billion in claims have been approved.

Meanwhile, rebuilding continues. A subway station destroyed on 9/11 finally reopened Saturday. In June, doors opened at the 80-story 3 World Trade Center, one of several rebuilt office towers that have been constructed or planned at the site. A performing arts centre is rising.

However, work was suspended in December on replacing a Greek Orthodox church crushed in the attacks; the project hit financial problems.

WATCH: A friend in need — a Canadian response to 9/11.

Click to play video: 'A Friend in Need: A Canadian response to 9/11'
A Friend in Need: A Canadian response to 9/11

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