President Joe Biden will commemorate the 20th anniversary of the Sept. 11 attacks on the United States on Saturday by visiting each of the sites where hijacked planes crashed in 2001, seeking to honor the victims of the devastating assault.
Biden will begin the day in New York, where he will attend a ceremony at 8:30 EDT at the site where the World Trade Center's twin towers once stood before planes struck the two buildings and caused them to collapse.
Then he will travel to Shanksville, Pennsylvania, where United Flight 93 crashed into a field after passengers overtook the hijackers and prevented another target from being hit.
Finally Biden will return to the Washington area to visit the Pentagon, the symbol of US military might that was pierced by another of the planes that were used as missiles that day.
The anniversary comes shortly after the end of the US-led war in Afghanistan, launched some 20 years ago to root out al Qaeda, which carried out the 9/11 attacks.