President Joe Biden is set to visit three sites that were attacked on Sept. 11, 2001, on the 20th anniversary of the tragic day that took at least 2,977 lives and injured thousands more. According to a release from the White House, Biden and First Lady Jill Biden will start the day in New York in a commemoration ceremony at the National September 11th Memorial, the site where the World Trade Center’s twin towers once stood before attacks that caused them to collapse. From there, the Bidens will travel to Shanksville, Pennsylvania, to attend a wreath laying ceremony at the Flight 93 National Memorial, the site where United Flight 93 crashed into a field after passengers thwarted hijackers’s plans to hit another target. Finally, the President and the First Lady will join Vice President Kamala Harris and the Second Gentleman Douglas Emhoff for a wreath laying ceremony at the Pentagon, …