Dogs of 9/11: Search and rescue canines worked tirelessly in days following terror attacks
Thousands of firefighters and emergency medical personnel responded to Ground Zero, including more than 300 specialized canine search and rescue teams.
Sept. 11, 2001: 2,977 lives were lost in a day during the worst terror attack on US soil
More than 2,600 people perished at the World Trade Center, 125 people died at the Pentagon and 256 people died on four airplanes on 9/11.
Never forget: A timeline of events on September 11, 2001
It’s been 19 years since the United States became "a nation transformed."
Trump and Biden to both visit Shanksville for 9/11 anniversary
It was not immediately clear whether their visits to the memorial will overlap. But it probably will be the closest that the candidates have been to one another in months.