MANCHESTER, Mo. – It is a somber day in America, as Wednesday marks the 23rd year since the Sept. 11 attacks.

A ceremony is set to take place at Stoecker Park in Manchester at 5:30 p.m. Wednesday.

The Flags of Valor display is set up and features 412 flags, each one honoring a first responder who died in the attacks. One flag also represents those who have succumbed to 9/11-related illnesses, along with pictures of civilians who died in the attacks.

There are many other ceremonies taking place Wednesday. One of the first will be at Scott Air Force Base at 7:40 a.m. Wednesday morning. There will be speeches along with wreath-laying and bell-ringing.

9/11 has turned into a national day of service. Another event that is happening at the Enterprise Center is the Volunteer Meal Pack starting at 9 a.m.

1400 volunteers will pack more than 400,000 meals for those in need. Among those taking part in that event: St. Louis Mayor Tishaura Jones.

The Annual March to the Arch is also taking place again this year. That event will begin at 9:11 a.m. Wednesday morning at Mike Duffy’s restaurant on Clayton Road. The group will then make the 21-mile memorial walk to the base of the arch.

Other events include a remembrance ceremony and walk in O’Fallon, Missouri. The ceremony is set for 8:30 Wednesday morning, followed by the optional walk.

There will be a cleanup at Jefferson Barracks National Cemetery. That event, organized by the nonprofit group Carry the Load, will run from 10 a.m. until 1 p.m. on Wednesday.

At 11:30 a.m. Wednesday morning, there will also be a ceremony at the Belleville Fire Department Station 4 on South Illinois Street.