President Joe Biden and First Lady Jill Biden on Sept. 11 joined a commemoration of the 9/11 terrorist attacks at Ground Zero in Lower Manhattan, New York City. Former Presidents Barack Obama and Bill Clinton and former First Ladies Michelle Obama and Hillary Clinton were also at the ceremony, along with a host of current and former officials like House Speaker Nancy Pelosi (D-Calif.) and former New York City Mayor Rudy Giuliani. The memorial began at 8:40 a.m. with an honor guard representing New York firefighters and police officers. Some officers were carrying an American flag; the contingent was followed by drummers and bagpipers. The Young People’s Chorus of NYC sang the national anthem. At 8:46 a.m, a bell was rung to mark the time the first plane hit the North Tower in Manhattan 20 years prior. Little sound could be heard, apart from fountains burbling. Speakers soon started reading the …