NEW YORK (AP) — Americans are remembering 9/11 with moments of silence, readings of victims’ names, volunteer work and other tributes, 21 years after the deadliest terror attack on U.S. soil. Victims’ relatives and dignitaries will convene Sunday at the places where hijacked jets crashed on Sept. 11, 2001. President Joe Biden plans to speak and lay a wreath at the Pentagon, while first lady Jill Biden is scheduled to speak in Shanksville, Pennsylvania. Vice President Kamala Harris and her husband are due at the World Trade Center in New York, but by tradition, no political figures speak at the ground zero ceremony. Other communities around the country are holding their own commemorations. Locally, the South Strabane Police and Fire Departments held their annual service in front of the memorial at the Washington Mall parking lot Sunday morning.