After the ceremony, the national memorial shared a statement of apology on Facebook to those who may have been unable to attend due to the sanctuary's 1,200-person capacity or in the overflow areas.

Events marking 30 years since the tragic Oklahoma City bombing: from the 30th Anniversary Remembrance Ceremony to free entry at the Oklahoma City National Memorial & Museum and info about the upcoming Memorial Marathon.

Thirty years after the deadliest homegrown attack in U.S. history, former President Bill Clinton will return to Oklahoma City for remembrance ceremony.