US commemorates 18th anniversary of 9/11
© Getty

Tributes poured in across the U.S. on Wednesday as the country recognized the anniversary of the Sept. 11, 2001, terrorist attacks.

This week marks 18 years since nearly 3,000 people were killed in coordinated attacks that struck the World Trade Center and the Pentagon, plunging the U.S. into war in Afghanistan and later Iraq.

ADVERTISEMENT

President TrumpDonald John TrumpThis week: House kicks off public phase of impeachment inquiry Impeachment week: Trump probe hits crucial point Judd Gregg: The big, big and bigger problem MORE and first lady Melania TrumpMelania TrumpTrump gets a warm reception at Alabama-LSU game Comedy group swaps Trump Jr. book jacket with fake title: 'Daddy, Please Love Me' Man pleads guilty in plot to attack Cleveland on July 4 MORE hosted a ceremony at the White House that included a moment of silence for the victims of the attacks, while leaders of the House and Senate led a concurrent ceremony at the Capitol.

Video of the event at the Capitol showed lawmakers singing "God Bless America" following the moment of silence.

Flags at the White House and on federal buildings were lowered to half staff Wednesday in honor of the victims.

A remembrance ceremony in New York City also featured members of the New York Police Department and other first responders, a nod to the scores of first responders who were sickened or killed attempting to rescue victims at Ground Zero shortly after the attacks.

City officials lit up the New York skyline Tuesday night with two beams of light representing the fallen towers, an annual tribute to the landmark.

The future of such practices, however, is unclear following a New York Times report this week that found the beams of light endanger the lives of around 160,000 birds every year during the 9/11 remembrance ceremonies.

Various top administration officials also recognized the 18th anniversary of the attacks on Wednesday.

"9/11 still haunts me. Almost 20 years later, I still reflect on that day & I’m resolved that we’ve got to get counterterrorism right," Secretary of State Mike PompeoMichael (Mike) Richard PompeoIran lays foundation for second nuclear plant: report Pompeo knocks Iran's treatment of UN nuclear inspector Reagan statue unveiled near site where he called for Gorbachev to 'tear down' Berlin Wall MORE tweeted.