Unforgiveable and Absolutely Unimaginable': Victims Honored on 20th Anniversary of Oklahoma City Bombing

OKLAHOMA CITY (TheBlaze/AP) — Every day when Dr. Rosslyn Biggs goes to work as a federal government veterinarian she is reminded of her mother, one of 168 people killed in the Oklahoma City bombing and honored Sunday on the 20th anniversary of the deadliest terrorist attack on U.S. soil until Sept. 11, 2001.

In this May 5, 1995 file photo, a large search and rescue crew attends a memorial service in front of the Alfred P. Murrah Federal Building in Oklahoma City. (Image source: AP/Bill Waugh, Flle)

Biggs has the same job once held by her mother, Dr. Margaret L. "Peggy" Clark, as a food safety veterinarian at the U.S. Department of Agriculture. She interacts often with some of the people who worked with and recall her mother's professionalism.

"I remember her spirit and her dedication," Biggs said as she and other family members gathered around an empty chair adorned with flowers in a field of empty chairs designed to memorialize the victims of the April 19, 1995 bombing.

"It's wonderful to see that people still remember and still care," Biggs said. Memorial officials estimated that 2,500 people attended the observance.

People sing "The Star-Spangled Banner" with the Survivor Tree in the background during a remembrance ceremony, Sunday, April 19, 2015, at the Oklahoma City National Memorial & Museum in Oklahoma City. (Image source: Doug Hoke/The Oklahoman via AP, Pool)

The service started with a 168-second moment of silence to honor each of those who died. It concluded about 90 minutes later with survivors and tearful relatives of the dead reading the names of those killed.

"This was a place of unspeakable horror and tragedy," said Frank Keating, who completed his first 100 days as Oklahoma's governor the day before the attack. "How some evil individual would do what he did ... is unforgiveable and absolutely unimaginable."

"The agony was consistent. The agony appeared never to end," Keating said.

Former President Bill Clinton, who was president when the attack occurred, spoke at Sunday's service at the Oklahoma City National Memorial & Museum, where the Alfred P. Murrah Federal Building once stood.

"Oklahoma City, you have chosen well," Clinton said. "For 20 years you have honored the memories of your loved ones. You have inspired us with the power of renewal."

Former President Bill Clinton speaks during a remembrance ceremony, Sunday, April 19, 2015, at the Oklahoma City National Memorial & Museum in Oklahoma City. (Image source: Doug Hoke/The Oklahoman via AP, Pool)

Clinton said the city has recovered from the terrorist attack "in the face of mad, crazy people who think that differences are all that matter."

"The whole world needs you now," the former president said in reference to other deadly terrorist attacks that have occurred around the world.

After the service, LaDonna Battle and her family were standing between two of the 168 metal and glass chairs that now stand as a testament to those who were killed. The two chairs were inscribed with the names of her parents, Calvin and Peola Battle, who were arranging to receive Social Security benefits when the bomb detonated.

The chair dedicated to bombing victim Baylee Almon is pictured in the Field of Empty Chairs at the Oklahoma City National Memorial at dusk in Oklahoma City, Tuesday, April 14, 2015. The Alfred P. Murrah Federal Building was located where the Field of Empty Chairs is now. Almon was the baby pictured in the iconic Pulitzer Prize-winning photo of the bombing. (Image source: AP/Sue Ogrocki)

"We're completing a journey with steel hearts. We're rebuilding our lives." LaDonna Battle said.

Timothy McVeigh, an Army veteran with strong anti-government views, carried out the bombing as revenge for the deadly standoff between the FBI and Branch Davidians in Waco, Texas, on April 19, 1993 — exactly two years before Oklahoma City.

McVeigh was convicted on federal murder and conspiracy charges in 1997 and executed in 2001.

His Army buddy, Terry Nichols, was convicted on federal and state bombing-related charges and is serving multiple life sentences in a federal prison.

In a statement, President Barack Obama thanked first responders who risked their lives after the bombing, law enforcement and prosecutors who brought the perpetrators to justice and ordinary men and women in Oklahoma for their resilience.

"If those murderers hoped to terrorize the American people that day, to break our spirits or shatter the bonds that unite us, then they completely and utterly failed," Obama said.

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