September 11 anniversary: Arlington County ceremony and moment of silence

ARLINGTON, Va. (AP/WJLA) - Arlington County officials will lead a moment of silence to mark the 12th anniversary of the Sept. 11 attacks.

Sheriff Beth Arthur, Police Chief Doug Scott and Fire Chief James Schwartz will participate in the ceremony Wednesday at the county's Courthouse Plaza.

A moment of silence will be held at 9:37 a.m., when American Airlines Flight 77 crashed into the west side of the Pentagon, killing 184 people.

Arlington County is home to the Pentagon, and first responders from Arlington were among the first on the scene that day.

The Pentagon will also host a private ceremony Wednesday for victims' families and loved ones, as well as survivors. The President is expected to attend the event, which will close the Pentagon's 9/11 memorial. That memorial is expected to reopen around 11 a.m.

Other ceremonies are scheduled in Alexandria, Fort Belvoir and throughout northern Virginia.

First lady Michelle Obama is expected at Belvoir Wednesday afternoon. Later in the day, actor and veterans' advocate Gary Sinise will be performing a concert at the base.