The 9:02 gate at the Oklahoma City National Memorial and Museum is pictured behind a sign announcing the closure of the site, Wednesday, April 15, 2020, in Oklahoma City. Due to COVID-19 concerns, the site scaled back its plans for a 25th anniversary remembrance and will instead offer a recorded, one-hour television program that includes the reading of the names of the 168 people killed in the bombing followed by 168 seconds of silence, instead of the annual open-to-the-public ceremony. (AP Photo/Sue Ogrocki)

In this March 28, 2020, photo provided by the Oklahoma City National Memorial and Museum, Michelle Brooks, whose sister, Valerie Jo Koelsch, was killed in the 1995 Oklahoma City bombing, is videotaped as part of a presentation by the Oklahoma City National Memorial and Museum. Due to COVID-19 concerns, the memorial will offer a recorded, one-hour television program that includes the reading of the names of the 168 people killed in the bombing followed by 168 seconds of silence, instead of the annual open-to-the-public ceremony. (Oklahoma City National Memorial and Museum via AP)

FILE-- In this April 19, 1995, file photo, rescue workers stand in front of the Alfred P. Murrah Federal Building following an explosion in downtown Oklahoma City. One hundred sixty-eight people died as a result of the explosion. The Oklahoma City National Memorial and Museum scaled back its plans for a 25th anniversary remembrance amid the coronavirus outbreak and will instead offer a recorded, one-hour television program that includes the reading of the names of the 168 people killed in the bombing followed by 168 seconds of silence. (AP Photo/David Longstreath, File)

A gate leading to the Oklahoma City National Memorial and Museum is pictured behind a "closed" sign Wednesday, April 15, 2020, in Oklahoma City. Due to COVID-19 concerns, the museum scaled back its plans for a 25th anniversary remembrance and will instead offer a recorded, one-hour television program that includes the reading of the names of the 168 people killed in the bombing followed by 168 seconds of silence, instead of the annual open-to-the-public ceremony. (AP Photo/Sue Ogrocki)