Vice President Mike Pence and two Virginia senators will participate in remembrance ceremonies to mark the anniversary of the Sept. 11 attacks.
Tuesday marks the 17th anniversary of the attack on the Pentagon, which lies within Arlington County. American Airlines Flight 77 struck the Pentagon the morning of Sept. 11, 2001; 184 victims were killed.
Pence will participated in the Pentagon's Sept. 11 observance Tuesday.
Senators Mark Warner and Tim Kaine will participate in a wreath-laying ceremony at Courthouse Plaza in Arlington. A moment of silence will be held at 9:37 a.m. to mark the moment the moment the plane hit the Pentagon.
Alexandria is also conducting its annual Sept. 11 remembrance ceremony Tuesday at 10 a.m. at the city's Market Square.
Nearly 3,000 people died on 9/11 when other airplanes were flown into New York's World Trade Center and the Pentagon in an attack planned by al-Qaida leader Osama bin Laden. Nearly a decade later, bin Laden was killed in May 2011 during a U.S. military operation ordered by President Barack Obama.