9/11 memorials honor victims in DC, NYC and Pennsylvania

(NewsNation) — The United States is commemorating the 24th anniversary of the deadly Sept. 11, 2001, attacks with memorial ceremonies and moments of silence Thursday.

Whether at ground zero in New York City, the Pentagon or a rural field near Shanksville, Pennsylvania, millions across the country are expected to honor the nearly 3,000 lives lost during the coordinated terrorist attacks.

National 9/11 Memorial and Museum in New York

Families of those killed in the World Trade Center will gather at Memorial Plaza at 8:30 a.m. EDT, where six moments of silence will be observed and victims' names will be read aloud.

The Tribute in Light, two blue beams positioned to echo the Twin Towers, will light up the sky from dusk until dawn Thursday night. 

NewsNation local affiliate WPIX will stream the commemoration ceremony.

Ceremony honors hijacked Flight 93 in Pennsylvania

The Flight 93 National Memorial in Shanksville will hold an annual remembrance service at 9:45 a.m. EDT on Thursday.

The ceremony will honor the 40 crew members and passengers who died after their plane was hijacked. People aboard attempted to storm the cockpit of the plane to retake it, but the craft ultimately crashed into an empty field in Pennsylvania.

The names of each passenger and crew member will be read aloud, and a wreath-laying ceremony is scheduled. NewsNation local affiliate WTAJ will stream the ceremony.

Trump to attend Pentagon's 9/11 memorial

President Donald Trump and first lady Melania Trump will attend an annual flag ceremony honoring the 184 service members and civilians killed when a jetliner flew into the U.S. military headquarters.

After the 8:45 a.m. EDT service, the president is expected to attend a baseball game between the New York Yankees and the Detroit Tigers in New York.