HUD Secretary Ben Carson is scheduled to speak at a memorial ceremony today for the Oklahoma City bombing.

Carson will deliver a speech titled “You Are Not Forgotten” at the Remembrance Ceremony to honor those who were killed, those who survived, and those changed forever by the attack on the Alfred P. Murrah Federal Building on April 19, 1995.

A memorial to the bombing's victims now sits on the former site of the federal building, and a nearby building that was damaged in the bombing houses an interactive museum.

Each year on the bombing's anniversary, family members of victims, survivors, rescue workers and others return to the memorial for a remembrance ceremony.

The U.S. Department of Housing and Urban Development says Carson will speak on the 22nd anniversary of the 1995 attack. The explosion killed 168 people, including 19 children. It was the deadliest terrorist attack on U.S. soil until the Sept. 11 attacks six years later.

Oklahoma City's Alfred P. Murrah Building housed HUD offices as well as employees from other federal agencies. HUD lost 35 employees when the building was bombed' 50 workers from the agency survived.

Timothy McVeigh was convicted of the bombing and was later executed. Terry Nichols was convicted of conspiracy in connection with the bombing and is serving life in prison.